Approximation: meaning, definitions and examples

Used when you want to describe something that is almost, but not exactly, equal or correct. Often used in mathematics or sciences.

• The scientist made an approximation of the results based on the sample data.
• His drawing is a good approximation of the original painting.

Commonly used in business, construction, and other fields when calculating time, cost, effort, or resources needed. It implies a considered judgment based on available information.

• The builder gave an estimate of $5,000 for the repair work.
• Can you estimate how much time it will take to finish the project?

Used when performing a quick, informal calculation that doesn’t require precision, often for practical purposes.

• I made a rough calculation and figured we’d need about 20 minutes to get there.
• He did a rough calculation of the expenses for the trip.

Used in everyday language when you are trying to guess something and your guess is nearly correct.

• Her answer was a close guess, but not exactly right.
• He made a close guess about the number of people in the room.

Use this word when you want to describe something that is close to something else but not exact. It implies a mathematical or scientific approach to getting close to the actual value.

• The approximation of pi is often used in calculations
• The map provides an approximation of the terrain

Use this term when referring to an initial, unfinished version of something. It suggests that there are areas that still need improvement or refinement.

• This is just a rough version of the report; the final draft will be ready next week
• The rough version of the software may have some bugs

This word is best used when something is trying to replicate or mimic another thing, often implying a lesser quality or authenticity. It can have a somewhat negative connotation.

• The imitation leather on the sofa looks quite real
• He speaks with an imitation of a British accent

Use this phrase when something is designed to closely resemble something else, often visually or structurally. It’s a neutral term without implying quality.

• The artist's painting is a near representation of the old city
• The model is a near representation of the proposed building