approximation

noun

ap·​prox·​i·​ma·​tion ə-ˌpräk-sə-ˈmā-shən 

1

: the act or process of drawing together

2

: the quality or state of being close or near

an approximation to the truth

an approximation of justice

3

: something that is approximate

especially : a mathematical quantity that is close in value to but not the same as a desired quantity

approximative

ə-ˈpräk-sə-ˌmā-tiv 

adjective

Examples of approximation in a Sentence

This isn't an exact figure but I think it's a good approximation of what the land is worth.

The color of the paint isn't the exact same color as the vase, but it's a close approximation.

Recent Examples on the Web

Today, chatbots can run the actuarial numbers, potentially alleviating some uncertainty concerns by, say, offering a close approximation for achieving life milestones. — Gili Malinsky, CNBC, 22 Oct. 2026

Some wondered whether Schrödinger’s equation might be an approximation that works extremely well at the microscopic scale but breaks down at the macroscopic scale, which would mean the measurement postulate of the Copenhagen interpretation is right. — Philipp Strasberg, Scientific American, 20 Oct. 2026

In both approaches, models rely on approximations to fill data gaps, whether from regions with sparse weather stations or complex atmospheric phenomena that scientists are still working to understand. — Justine Calma, The Verge, 14 Oct. 2026

At home, Bob could put those videos on a widescreen television and experience some approximation of being there again. — Théoden Janes, Charlotte Observer, 7 Oct. 2026

Word History

First Known Use

15th century, in the meaning defined at sense 1

Rhymes for approximation

• abbreviation
• abomination
• acceleration
• accentuation
• accommodation
• accreditation
• acculturation
• accumulation
• acetylation
• adjudication
• administration
• adulteration

Kids Definition

approximation

noun

ap·​prox·​i·​ma·​tion ə-ˌpräk-sə-ˈmā-shən 

1

: a coming near or close (as in value)

2

: something approximate

especially : an estimate or figure that is almost exact