• 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"

  同义词： mark

• a public display of a (usually written) message

  "he posted signs in all the shop windows"

• any communication that encodes a message

  "signals from the boat suddenly stopped"

  同义词： signal signaling

• structure displaying a board on which advertisements can be posted

  "the highway was lined with signboards"

  同义词： signboard

• (astrology) one of 12 equal areas into which the zodiac is divided

  同义词： sign of the zodiac star sign mansion house planetary house

• (medicine) any objective evidence of the presence of a disorder or disease

  "there were no signs of asphyxiation"

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

  "charges of opposite sign"

  同义词： polarity

• an event that is experienced as indicating important things to come

  "it was a sign from God"

  同义词： augury foretoken preindication

• 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"

• a character indicating a relation between quantities

  "don't forget the minus sign"

• mark with one's signature; write one's name (on)

  "She signed the letter and sent it off"; " Please sign here"

  同义词： subscribe

• approve and express assent, responsibility, or obligation

  "Have you signed your contract yet?"

  同义词： ratify

• be engaged by a written agreement

  "He signed to play the casino on Dec. 18"; " The soprano signed to sing the new opera"

• engage by written agreement

  "They signed two new pitchers for the next season"

  同义词： contract sign on sign up

• 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"

  同义词： signal signalize signalise

• place signs, as along a road

  "sign an intersection"; " This road has been signed"

• communicate in sign language

  "I don't know how to sign, so I could not communicate with my deaf cousin"

• make the sign of the cross over someone in order to call on God for protection; consecrate

  同义词： bless

同义词： gestural signed sign-language(a)