Real Dictionary

notice
countable noun: A notice is a formal announcement in a newspaper or magazine about something that has happened or is going to happen.
countable noun: A notice is a written announcement in a place where everyone can read it.
uncountable noun: If you give notice about something that is going to happen, you give a warning in advance that it is going to happen.
verb: If you notice something or someone, you become aware of them.

notice in American English
information, announcement, or warning; esp., formal announcement or warning, as in a newspaper
noun: an announcement or intimation of something impending; warning
transitive verb: to pay attention to or take notice of

notice in British English
to become conscious or aware of; perceive; note
noun: the act of perceiving; observation; attention

notice in Hospitality
noun: A notice is a written announcement in a place where everyone can read it.