noun, noun or participle which takes 'suru', intransitive verb, noun which may take the genitive case particle 'no'
approximation; close resemblance
Used for mathematical approximation or describing things that are very similar. Often used in technical contexts, but also in general language.
この値は真の値に近似している。
This value approximates the true value.
二つのデザインは近似
The two designs are similar, but the details differ.