This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. One that expounds or interprets.

n. One that speaks for, represents, or advocates: Our senator is an exponent of free trade.

n. Mathematics 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.

adj. Expository; explanatory.

n. One who expounds, represents or advocates

n. The power to which a number, symbol or expression is to be raised. For example, the 3 in x3.

n. A number, letter, or any quantity written on the right hand of and above another quantity, and denoting how many times the latter is repeated as a factor to produce the power indicated.

n. One who, or that which, stands as an index or representative.

n. one who explains, expounds, or interprets.

Exemplifying; explicating.

n. One who expounds or explains.

n. One who or that which stands as an index or representative; one who or that which exemplifies or represents the principle or character of something: as, the leader of a party is the exponent of its principles.

n. In algebra, a symbol placed above and at the right of another symbol (the base), to denote that the latter is to be raised to the power indicated by the former.

n. A particular example illustrating the meaning of a general statement.

n. a mathematical notation indicating the number of times a quantity is multiplied by itself

n. someone who expounds and interprets or explains

n. a person who pleads for a cause or propounds an idea

"Perhaps its best-known living exponent is Marshal Pétain."

intellect    intellectual   

exponent proposition   

exponent of inseparability   

thinker    advocate    biographer    practitioner    exposition    embodiment    theologian    disciple    admirer    representative