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

An approximation of this action gets the job done more than adequately here. —Shilpa Uskokovic, Bon Appetit Magazine, 11 Feb. 2026

If your goal is to get at the truth, or at least our closest approximation of it at the present time, the way to do that is to be scrupulous and forthright about the strengths and weaknesses of every link in your chain of argument. —Big Think, 10 Feb. 2026

Computer scientists often assume that the brain works by approximations, and therefore that computing hardware inspired by the brain won’t be as good at complex math as traditional hardware. —IEEE Spectrum, 2 Feb. 2026

An even better approximation for economic activity adds in the productivity of the specific people who are in—or out—of the population. —Bill Conerly, Forbes.com, 30 Jan. 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