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.
The failure to take action against infringing parties, or otherwise indicating, implicitly or explicitly, that nothing will be done about the infringing action. Acquiescing can lead to abandonment of trademark rights.
Action or inaction which binds a person legally even though it was not intended as such. For example, action which is not intended as a direct acceptance of a contract will nevertheless stand as such as it implies recognition of the terms of the contract. For example, if I display a basket of fruit in a marketplace and you come by, inspect an apple and then bite into it, you have acquiesced to the contract of sale of that apple. Acquiescence also refers to allowing too much time to pass since you had knowledge of an event which may have allowed you to have legal recourse against another, implying that you waive your rights to that legal recourse.