The verb exact has 2 senses (first 1 from tagged texts)
1. (1) demand, exact -- (claim as due or just; "The bank demanded payment of the loan")
2. claim, take, exact -- (take as an undesirable consequence of some event or state of affairs; "the accident claimed three lives"; "The hard work took its toll on her")
Overview of adj exact
The adj exact has 2 senses (first 2 from tagged texts)
1. (8) exact -- (marked by strict and particular and complete accordance with fact; "an exact mind"; "an exact copy"; "hit the exact center of the target")
2. (7) accurate, exact, precise -- ((of ideas, images, representations, expressions) characterized by perfect conformity to fact or truth ; strictly correct; "a precise image"; "a precise measurement")