(idiomatic) To understand or grasp. / (idiomatic) To be in control of, to have power over.

(idiomatic) Used to express gratitude at unnecessary generosity, especially when receiving a gift.

(idiomatic) To be organized; to have one's affairs in order; specifically, to have a multi-person effort coordinated towards the exact same goal.

To have accomplished all there is to do; to have no further work or difficulty. / To have achieved a lifestyle characterized by good fortune and comfort.

(Australia) A jocular explanation for bad luck.

To engage in sex. / To engage in any sexual act.

(vulgar slang, intransitive, usually of a man) to masturbate

(idiomatic) To have permission or time to speak, especially in a formal situation.

(UK, Ireland) To prepare to exhibit plenty of vitality or strength or other superior performance.

(idiomatic) To seek to have two things which are mutually incompatible (such as eating a piece of cake and yet still possessing that piece for future use).