meaning of approximation
1. The act of approximating; a drawing, advancing or being near; approach; also, the result of approximating.
2. An approach to a correct estimate, calculation, or conception, or to a given quantity, quality, etc.
3. A continual approach or coming nearer to a result; as, to solve an equation by approximation.
4. A value that is nearly but not exactly correct.
5. the act of bringing near or bringing together especially the cut edges of tissue