Available Definitions:
1) a. - Oppressive or unreasonably severe in making demands or requiring the exact fulfillment of obligations; harsh; severe.
2) a. - Habitually careful to agree with a standard, a rule, or a promise; accurate; methodical; punctual; as, a man exact in observing an appointment; in my doings I was exact.
3) a. - Precisely or definitely conceived or stated; strict.
4) a. - To demand or require authoritatively or peremptorily, as a right; to enforce the payment of, or a yielding of; to compel to yield or to furnish; hence, to wrest, as a fee or reward when none is due; -- followed by from or of before the one subjected to exaction; as, to exact tribute, fees, obedience, etc., from or of some one.
5) v. i. - To practice exaction.