ontology–opening night Vocabulary (O Words) – Meanings & Synonyms

ontology

PhilosophyC2

Meaning: The study of being or existence.

Part of speech: noun

Example: Ontology explores the nature of reality.

Category: Philosophy

Synonyms: philosophy of being

onus

GeneralC1

Meaning: A burden or responsibility.

Part of speech: noun

Example: The onus is on you to complete the project.

Category: General

Synonyms:

burden
responsibility

Antonyms:

relief
exemption

onward

MovementB2

Meaning: Moving forward; ahead.

Part of speech: adverb

Example: We traveled onward to the next city.

Category: Movement

Synonyms:

forward
ahead

Antonyms:

backward
back

onyx

MineralogyC1

Meaning: A type of gemstone, often black or banded.

Part of speech: noun

Example: She wore an onyx ring.

Category: Mineralogy

Synonyms:

gemstone
stone

oo

GeneralA1

Meaning: An expression of surprise or admiration.

Part of speech: interjection

Example: Oo, that’s a beautiful painting!

Category: General

Synonyms:

wow
oh

oodles

GeneralB2

Meaning: A large amount or number.

Part of speech: noun

Example: She has oodles of time to finish her project.

Category: General

Synonyms:

lots
plenty

Antonyms:

few
scarcity

ooh

GeneralA1

Meaning: An expression of surprise or pleasure.

Part of speech: interjection

Example: Ooh, that cake looks delicious!

Category: General

Synonyms:

wow
oh

oomph

GeneralB2

Meaning: Energy or enthusiasm.

Part of speech: noun

Example: The presentation had a lot of oomph.

Category: General

Synonyms:

energy
vitality

Antonyms:

lethargy
apathy

oops

GeneralA1

Meaning: An expression of a mistake or accident.

Part of speech: interjection

Example: Oops, I dropped the glass!

Category: General

Synonyms:

whoops
uh-oh

ooze

GeneralB2

Meaning: To flow or leak slowly.

Part of speech: verb

Example: The syrup began to ooze from the bottle.

Category: General

Synonyms:

leak
seep

Antonyms:

dry
absorb

op

BusinessB2

Meaning: Short for operation or opportunity.

Part of speech: noun

Example: He got a great op to work abroad.

Category: Business

Synonyms:

opportunity
chance

op Cit

AcademicC2

Meaning: Short for 'opere citato', meaning 'in the work cited'.

Part of speech: noun

Example: You can find more details in op cit.

Category: Academic

Synonyms: cited work

opacity

PhysicsC1

Meaning: The quality of being opaque; not allowing light to pass through.

Part of speech: noun

Example: The opacity of the glass made it hard to see through.

Category: Physics

Synonyms:

opaqueness
cloudiness

Antonyms:

transparency
clarity

opal

MineralogyC1

Meaning: A type of gemstone that displays a play of colors.

Part of speech: noun

Example: She wore an opal necklace.

Category: Mineralogy

Synonyms:

gemstone
stone

opalescent

MineralogyC2

Meaning: Showing varying colors like an opal.

Part of speech: adjective

Example: The opalescent surface shimmered in the light.

Category: Mineralogy

Synonyms:

iridescent
shimmering

opaque

PhysicsC1

Meaning: Not able to be seen through; not transparent.

Part of speech: adjective

Example: The opaque curtain blocked the sunlight.

Category: Physics

Synonyms:

cloudy
non-transparent

Antonyms:

clear
transparent

OPEC

EconomicsC1

Meaning: An organization of oil-producing countries.

Part of speech: noun

Example: OPEC regulates oil production among its member countries.

Category: Economics

Synonyms: Organization of the Petroleum Exporting Countries

op-ed

MediaB2

Meaning: A page in a newspaper or magazine for opinion pieces.

Part of speech: noun

Example: She wrote an op-ed about climate change.

Category: Media

Synonyms:

opinion piece
editorial

open

GeneralA1

Meaning: To move something to allow access.

Part of speech: verb

Example: Please open the door.

Category: General

Meaning 2: To start or begin something.

Example: They will open the new store next week.

Phrase: open up

Phrase example: She decided to open up about her feelings.

Phrase: open air

Phrase example: We had a picnic in the open air.

Synonyms:

unseal
begin

Antonyms:

close
shut

open day

EducationB2

Meaning: An event where a place is open to the public for visits.

Part of speech: noun

Example: The school held an open day for prospective students.

Category: Education

Synonyms:

public event
visitation day

open house

Real EstateB2

Meaning: An event where a place is open for visitors, often for a real estate showing.

Part of speech: noun

Example: The open house attracted many potential buyers.

Category: Real Estate

Synonyms:

public viewing
showing

open letter

PoliticsB2

Meaning: A letter intended for public reading.

Part of speech: noun

Example: The author wrote an open letter to address the issue.

Category: Politics

Synonyms: public letter

open market

EconomicsB2

Meaning: A market where prices are determined by supply and demand.

Part of speech: noun

Example: The open market allows for fair competition.

Category: Economics

Synonyms: free market

Antonyms: closed market

open out

GeneralB2

Meaning: To spread or unfold something.

Part of speech: verb

Example: He opened out the map to show the route.

Category: General

Synonyms:

unfold
spread

Antonyms:

fold
close

open pit

GeologyC1

Meaning: A large excavation in the ground for mining or other purposes.

Part of speech: noun

Example: The open pit mine was visible from miles away.

Category: Geology

Synonyms:

quarry
excavation

open prison

LawC1

Meaning: A type of prison with fewer restrictions on inmates.

Part of speech: noun

Example: He was transferred to an open prison for good behavior.

Category: Law › Criminal Law

Synonyms: minimum-security prison

open question

EducationB2

Meaning: A question that does not have a definitive answer.

Part of speech: noun

Example: The topic remains an open question in the field of science.

Category: Education

Synonyms: unresolved issue

open season

NatureC1

Meaning: A period during which hunting is allowed.

Part of speech: noun

Example: It's open season for deer hunting this month.

Category: Nature › Wildlife

Synonyms: hunting season

open secret

CommunicationB2

Meaning: Something that is supposed to be a secret but is widely known.

Part of speech: noun

Example: Their relationship was an open secret in the office.

Category: Communication

Synonyms: well-known fact

open University

EducationB2

Meaning: A university that offers courses to anyone without entry requirements.

Part of speech: noun

Example: She enrolled in an open University to continue her education.

Category: Education

Synonyms: distance learning university

open up

GeneralB2

Meaning: To become more accessible or available.

Part of speech: verb

Example: The city plans to open up new parks.

Category: General

Synonyms:

unveil
reveal

Antonyms:

close
hide

open-air

EventsB2

Meaning: Located outside; not enclosed.

Part of speech: adjective

Example: We enjoyed an open-air concert.

Category: Events

Synonyms:

outdoor
uncovered

Antonyms:

indoor
enclosed

open-and-shut

LawC1

Meaning: Clear and straightforward; easy to understand.

Part of speech: adjective

Example: It was an open-and-shut case.

Category: Law

Synonyms:

clear-cut
obvious

Antonyms:

ambiguous
complicated

opencast

MiningC2

Meaning: Referring to a type of mining done on the surface.

Part of speech: adjective

Example: The opencast mine was visible from the road.

Category: Mining

Synonyms: surface mining

open-door

BusinessB2

Meaning: Welcoming and accessible; allowing communication.

Part of speech: adjective

Example: The manager has an open-door policy.

Category: Business

Synonyms:

accessible
welcoming

Antonyms:

closed
exclusive

open-ended

GeneralB2

Meaning: Not having a clear or definite limit.

Part of speech: adjective

Example: The discussion was open-ended, allowing for many ideas.

Category: General

Synonyms:

indefinite
unrestricted

Antonyms:

definite
restricted

opener

GeneralA2

Meaning: A tool for opening something, like a bottle or can.

Part of speech: noun

Example: I need a bottle opener for this drink.

Category: General

Synonyms:

tool
device

opening

ArtsA2

Meaning: The act of beginning something.

Part of speech: noun

Example: The opening of the new store was a big event.

Category: Arts

Meaning 2: A gap or space that allows entry.

Example: There was an opening in the fence.

Synonyms:

beginning
start

Antonyms:

closing
ending

opening hours

BusinessA2

Meaning: The times during which a business is open to customers.

Part of speech: noun

Example: The opening hours of the library are from 9 AM to 5 PM.

Category: Business

Synonyms:

business hours
operating hours

opening night

ArtsB1

Meaning: The first performance of a play or event.

Part of speech: noun

Example: The opening night of the play was a huge success.

Category: Arts › Theatre

Synonyms:

premiere
debut

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