• structure displaying a board on which advertisements can be posted; "the highway was lined with Signboards"
• a perceptible indication of something not immediately apparent (as a visible clue that something has happened); "he showed Signs of strain"; "they welcomed the Signs of spring"
• any communication that encodes a message; "Signals from the boat suddenly stopped"
• a public display of a (usually written) message; "he posted Signs in all the shop windows"
• a character indicating a relation between quantities; "don''t forget the minus Sign"
• a gesture that is part of a Sign language
• a fundamental linguistic unit linking a Signifier to that which is Signified; "The bond between the Signifier and the Signified is arbitrary"--de Saussure
• an event that is experienced as indicating important things to come; "he hoped it was an augury"; "it was a Sign from God"
• (astrology) one of 12 equal areas into which the zodiac is divided
• having an indicated pole (as the distinction between positive and negative electric charges); "he got the polarity of the battery reversed"; "charges of opposite Sign"
• (medicine) any objective evidence of the presence of a disorder or disease; "there were no Signs of asphixiation"
• make the Sign of the cross over someone in order to call on God for protection; consecrate
• be engaged by a written agreement; "He Signed to play the casino on Dec. 18"; "The soprano Signed to sing the new opera"
• communicate in Sign language; "I don''t know how to Sign, so I could not communicate with my deaf cousin"
• mark with one''s Signature; write one''s name (on); "She Signed the letter and sent it off"; "Please Sign here"
• communicate silently and non-verbally by Signals or Signs; "He Signed his disapproval with a dismissive hand gesture"; "The diner Signaled the waiters to bring the menu"
• place Signs, as along a road; "Sign an intersection"; "This road has been Signed"
• engage by written agreement; "They Signed two new pitchers for the next season"
• approve and express assent, responsibility, or obligation; "All parties ratified the peace treaty"; "Have you Signed your contract yet?"

'Sign' in other languages