1. One that expounds or interprets. 2. One that speaks for, represents, or advocates: Our senator is an exponent of free trade.3.abbr.expMathematics A number or symbol, as 3 in (x + y)3, placed to the right of and above another number, symbol, or expression, denoting the power to which that number, symbol, or expression is to be raised. Also called power.
ADJECTIVE:
Expository; explanatory.
ETYMOLOGY:
Latin expnns, expnent-, present participle of expnere, to expound. See expound.
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