Meaning: A flat-topped hill or mountain.

Part of speech: noun

Example: The hikers reached the top of the mesa.

Category: Nature › Geography

Synonyms: tableland

Meaning: A dining area for military personnel or students.

Part of speech: noun

Example: The soldiers gathered in the mess hall for dinner.

Category: Military › Dining

Synonyms: dining hall

Meaning: To interfere with or cause trouble for someone.

Part of speech: phrasal verb

Example: Don't mess with my plans!

Category: General

Synonyms:

• interfere
• tamper

Meaning: A young person employed to deliver messages.

Part of speech: noun

Example: The messenger boy ran quickly to deliver the letter.

Category: Communication

Synonyms: courier boy

Meaning: The chemical processes that occur within a living organism to maintain life.

Part of speech: noun

Example: Exercise can boost your metabolism.

Category: Medicine › Biochemistry

Synonyms: biochemical processes

Meaning: Having the characteristics of metal; shiny and reflective.

Part of speech: adjective

Example: The metallic surface gleamed in the sunlight.

Category: Science › Chemistry

Synonyms:

• shiny
• reflective

Meaning: The craft of working with metals to create objects.

Part of speech: noun

Example: He learned metalwork to make sculptures.

Category: Arts › Crafts

Synonyms: metal crafting

Meaning: A figure of speech that describes something by saying it is something else.

Part of speech: noun

Example: In literature, a metaphor can create vivid imagery.

Category: Arts › Literature

Synonyms: figure of speech

Meaning: A small body from space that enters the Earth's atmosphere and produces a bright streak of light.

Part of speech: noun

Example: We saw a meteor streak across the night sky.

Category: Science › Astronomy

Synonyms: shooting star

Meaning: A colorless, odorless gas that is a major component of natural gas.

Part of speech: noun

Example: Methane is produced during the decomposition of organic matter.

Category: Science › Chemistry

Synonyms: natural gas

Meaning: A member of the Methodist Church.

Part of speech: noun

Example: She is a devoted Methodist who attends church every Sunday.

Category: Religion

Synonyms: Methodist Church member

Meaning: A system of measurement based on meters, liters, and grams.

Part of speech: noun

Example: The metric system simplifies calculations.

Category: Science › Measurement

Synonyms: SI system

Meaning: A unit of mass equal to 1,000 kilograms.

Part of speech: noun

Example: The shipment weighed five metric tons.

Category: Science › Measurement

Synonyms: tonne

Meaning: A device that produces a regular tick sound to help musicians keep time.

Part of speech: noun

Example: He practiced with a metronome to improve his rhythm.

Category: Music

Synonyms: timekeeper

Meaning: A large and densely populated city.

Part of speech: noun

Example: New York is a bustling metropolis.

Category: Geography

Synonyms:

• city
• urban center

Meaning: A row of houses or apartments, often converted from stables.

Part of speech: noun

Example: They live in a charming mews in the city.

Category: Architecture

Synonyms:

• courtyard
• alley

Meaning: A coordinated wave of standing up and sitting down by spectators in a stadium.

Part of speech: noun

Example: The crowd did a Mexican wave during the match.

Category: Sports

Synonyms: wave

Meaning: A low floor between two main floors of a building.

Part of speech: noun

Example: The office has a mezzanine for extra workspace.

Category: Architecture

Synonyms: intermediate floor

Meaning: A voice type between soprano and contralto.

Part of speech: noun

Example: She has a beautiful mezzo voice.

Category: Music › Vocal Types

Synonyms: mezzo-soprano

Meaning: A female singing voice between soprano and contralto.

Part of speech: noun

Example: The mezzo-soprano sang beautifully in the opera.

Category: Music › Vocal Types

Synonyms: female voice type

Meaning: Milligrams; a unit of mass equal to one thousandth of a gram.

Part of speech: noun

Example: The medicine dosage is measured in mgs.

Category: Science › Weight Measurement

Synonyms: weight unit

Meaning: Missing in Action; a term used for soldiers who are unaccounted for after a battle.

Part of speech: noun

Example: The soldier was declared MIA after the conflict.

Category: Military

Meaning: A shiny mineral used in various products, including cosmetics.

Part of speech: noun

Example: Mica is often found in eyeshadow for its shimmer.

Category: Science › Mineralogy

Meaning: A microscopic organism, especially a bacterium or virus.

Part of speech: noun

Example: Microbes can be beneficial or harmful to humans.

Category: Science › Biology

Synonyms: microorganism

Meaning: The branch of science that deals with microorganisms.

Part of speech: noun

Example: She studied microbiology in college.

Category: Science › Biology

Meaning: A small brewery that produces limited quantities of beer.

Part of speech: noun

Example: They opened a micro-brewery to create unique craft beers.

Category: Business › Food & Beverage

Meaning: A small computer designed for individual use.

Part of speech: noun

Example: The microcomputer revolutionized personal computing.

Category: Technology › Computing

Meaning: Small loans given to individuals to start small businesses.

Part of speech: noun

Example: Microcredit has helped many entrepreneurs in developing countries.

Category: Business › Finance

Meaning: Synthetic fiber that is finer than one denier, often used in cleaning products.

Part of speech: noun

Example: Microfiber cloths are great for cleaning without scratching.

Category: Miscellaneous › Textiles

Meaning: An organism that is microscopic, such as bacteria or viruses.

Part of speech: noun

Example: Micro-organisms play a crucial role in ecosystems.

Category: Science › Biology

Synonyms: microbe

Meaning: A small electronic device that processes data in computers.

Part of speech: noun

Example: The microprocessor is the brain of the computer.

Category: Technology › Computing

Meaning: An instrument used to see objects that are too small for the naked eye.

Part of speech: noun

Example: The scientist used a microscope to examine the cells.

Category: Science › Optics

Meaning: One millionth of a second.

Part of speech: noun

Example: The computer processes data in microseconds.

Category: Science › Physics

Meaning: The space in the air, especially when something is in flight.

Part of speech: noun

Example: The bird caught its prey in mid-air.

Category: Nature › Atmosphere

Meaning: The period of life between youth and old age, typically considered to be from about 40 to 65 years.

Part of speech: noun

Example: He is experiencing a lot of changes in middle age.

Category: Life › Aging

Meaning: The period in European history from about the 5th to the late 15th century.

Part of speech: noun

Example: The middle ages were marked by feudalism and the rise of kingdoms.

Category: History

Meaning: The central region of the United States, often associated with traditional values.

Part of speech: noun

Example: Middle America is known for its conservative views.

Category: Geography

Meaning: A social class between the upper and working classes, typically characterized by moderate income and education.

Part of speech: noun

Example: The middle class plays a significant role in the economy.

Category: Society › Economics

Meaning: A category of running events that are longer than sprints but shorter than long-distance races.

Part of speech: noun

Example: She excels in middle distance races like the 800 meters.

Category: Sports › Athletics

Meaning: A region that includes Western Asia and parts of North Africa.

Part of speech: noun

Example: The Middle East is known for its rich history and diverse cultures.

Category: Geography