[ɛkˈspəʊnənt], (Noun)

Definitions:
- a person who supports an idea or theory and tries to persuade people of its truth or benefits
(e.g: an early exponent of the teachings of Thomas Aquinas)

- a quantity representing the power to which a given number or expression is to be raised, usually expressed as a raised symbol beside the number or expression (e.g. 3 in 2³ = 2 × 2 × 2)

- a linguistic unit that realizes another, more abstract unit


Phrases:

Origin:
late 16th century (as an adjective in the sense ‘expounding’): from Latin exponent- ‘putting out’, from the verb exponere (see expound)