what is approximation in math
approximation. n. 1. the process or result of making a rough calculation, estimate, or guess: he based his conclusion on his own approximation of the fuel consumption.2. an imprecise or unreliable record or version: an approximation of what really happened.3. (Mathematics) maths an inexact number, relationship, or theory that is sufficiently accurate for a specific purpose. 4. (Mathematics) maths. a. an estimate of the value of some quantity to a desired degree of accuracy.. the process or result of making a rough calculation, estimate, or guess: he based his conclusion on his own approximation of the fuel consumption. 2. an imprecise or unreliable record or version: an approximation of what really happened.