Noun
-A silent or passive assent or submission, or a submission with
apparent content; - distinguished from avowed consent on the one
hand, and on the other, from opposition or open discontent; quiet
satisfaction.
-Submission to an injury by the party injured, or tacit
concurrence in the action of another.
That is the definition of acquiescence, did that help at all?
You could always try Googling it too.