All 3 Uses

ambiguous
in
Moby Dick
(Auto-generated)

This circumstance, coupled with his ambiguous, half-hinting, half-revealing, shrouded sort of talk, now begat in me all kinds of vague wonderments and half-apprehensions, and all connected with the Pequod; and Captain Ahab; and the leg he had lost; and the Cape Horn fit; and the silver calabash; and what Captain Peleg had said of him, when I left the ship the day previous; and the prediction of the squaw Tistig; and the voyage we had bound ourselves to sail; and a hundred other shadowy things.†
Chpt 19-21
Then again, Stubb was one of those odd sort of humorists, whose jollity is sometimes so curiously ambiguous, as to put all inferiors on their guard in the matter of obeying them.†
Chpt 46-48 *
But be all this as it may; let the unseen, ambiguous synod in the air, or the vindictive princes and potentates of fire, have to do or not with earthly Ahab, yet, in this present matter of his leg, he took plain practical procedures;—he called the carpenter.†
Chpt 106-108

Definitions:

(1) (ambiguous)
unclear -- because there could be two or more interpretations
(2) (meaning too rare to warrant focus)
More rarely, ambiguous can mean uncertain or doubtful -- as in the expression "an ambiguous smile".