Dictionary definition · sign
noun
- a perceptible indication of something not immediately apparent (as a visible clue that something has happened)"he showed signs of strain"
- a public display of a message"he posted signs in all the shop windows"
- any nonverbal action or gesture that encodes a message"signals from the boat suddenly stopped"
- structure displaying a board on which advertisements can be posted"the highway was lined with signboards"
- (astrology) one of 12 equal areas into which the zodiac is divided
- (medicine) any objective evidence of the presence of a disorder or disease"there were no signs of asphyxiation"
verb
- mark with one's signature; write one's name (on)"She signed the letter and sent it off"
- approve and express assent, responsibility, or obligation"All parties ratified the peace treaty"
- be engaged by a written agreement"He signed to play the casino on Dec. 18"
- engage by written agreement"They signed two new pitchers for the next season"
- communicate silently and non-verbally by signals or signs"He signed his disapproval with a dismissive hand gesture"
adjective
- used of the language of the deaf
Source: Open English WordNet (CC BY 4.0).