Usually with clause: To ask oneself in wonderment; to feel some doubt or curiosity (how, whether, why, etc.); to be desirous to know or learn.

To seek to know. Obsolete.

transitive. To ask oneself wonderingly or with astonished curiosity. With interrogative clause or direct speech as object.

transitive with indirect question as object. To ask oneself without necessarily seeking an answer; to wonder, muse upon, ponder (something unknown…

transitive. To wonder. (In quot. with clause as object.)