SIGNS

A perceptible indication of something not immediately apparent (as a visible clue that something has happened)

Example: "He showed signs of strain"

A public display of a message

Example: "He posted signs in all the shop windows"

Any nonverbal action or gesture that encodes a message

Example: "Signals from the boat suddenly stopped"

Structure displaying a board on which advertisements can be posted

Example: "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

Example: "There were no signs of asphyxiation"

Having an indicated pole (as the distinction between positive and negative electric charges)

Example: "He got the polarity of the battery reversed"

An event that is experienced as indicating important things to come

Example: "He hoped it was an augury"

A gesture that is part of a sign language

A fundamental linguistic unit linking a signifier to that which is signified

Example: "The bond between the signifier and the signified is arbitrary"

A character indicating a relation between quantities

Example: "Don't forget the minus sign"