#1 approximation n. [estimate, estimation, idea] an approximate calculation of quantity or degree or worth; "an estimate of what it would cost"; "a rough idea how long it would take". wn
#2 approximation n. the quality of coming near to identity (especially close in quantity). wn
#3 approximation n. an imprecise or incomplete account; "newspapers gave only an approximation of the actual events". wn
#4 approximation n. [bringing close together] the act of bringing near or bringing together especially the cut edges of tissue. wn
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