The act of noting or observing; perception or attention: That detail escaped my notice. Respectful attention or consideration: grateful for the teacher's notice. A written or printed announcement: a notice of sale. A formal announcement, notification, or warning, especially an announcement of one's intention to withdraw from an agreement or leave a job: gave my employer two weeks' notice; raised the price without notice. The condition of being formally warned or notified: put us on notice for chronic lateness. A printed critical review, as of a play or book. To take notice of; observe: noticed a figure in the doorway. See Synonyms at see1. To perceive with the mind; detect: noticed several discrepancies. To comment on; mention. To treat with courteous attention. To give or file a notice of: noticed the court case for next Tuesday.