"approximation" in the noun sense
1. estimate, estimation, approximation, 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"
2. approximation
the quality of coming near to identity (especially close in quantity)
3. approximation
an imprecise or incomplete account
"newspapers gave only an approximation of the actual events"
4. approximation, bringing close together
the act of bringing near or bringing together especially the cut edges of tissue
Source: WordNet® (An amazing lexical database of English)
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