say it: uh-prahk-suh-MAY-shuhn
approximation is a noun meaning "an approximate calculation of quantity or degree or worth". It carries 4 recorded senses.
an approximate calculation of quantity or degree or worth
“an estimate of what it would cost”
“a rough idea how long it would take”
the quality of coming near to identity (especially close in quantity)
an imprecise or incomplete account
“newspapers gave only an approximation of the actual events”
the act of bringing near or bringing together especially the cut edges of tissue
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for approximation come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.