Position, posture, arrangement (especially of the human body).

Affectation.

(transitive) To place in an attitude or fixed position, for the sake of effect.

(transitive) To ask; to set (a test, quiz, riddle, etc.).

(transitive) To constitute (a danger, a threat, a risk, etc.).

(transitive, in the phrase "to pose as") To falsely impersonate (another person or occupation) primarily for the purpose of accomplishing something or reaching a goal.

(intransitive) To assume or maintain a pose; to strike an attitude.

(intransitive) To behave affectedly in order to attract interest or admiration.

(now rare) to puzzle, non-plus, or embarrass with difficult questions.

(now rare) To perplex or confuse (someone).