Acquiescence

n. passive acceptance; compliance, yielding, submission, giving in

Acquiescence is, most generally, "permission" given by silence or passiveness.The common law doctrine of estoppel by acquiescence is applied when one party gives legal notice to a second party of a fact or claim, and the second party fails to challenge or refute that claim within a reasonable time. The second party is said to have acquiesced to the claim, and is estopped from later challenging it, or making a counterclaim. The doctrine is similar to, and often applied with, estoppel by laches.
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Noun
1. acceptance without protest
(hypernym) acceptance
(derivation) assent, accede, acquiesce
2. agreement with a statement or proposal to do something; "he gave his assent eagerly"; "a murmur of acquiescence from the assembly"
(synonym) assent
(hypernym) agreement
(hyponym) acceptance
(derivation) assent, accede, acquiesce

(n.)
Tacit concurrence in the action of another.
  

(n.)
Submission to an injury by the party injured.
  

(n.)
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.
  

Action or inaction which binds a person legally even though it was not intended as such. - (read more on Acquiescence)