noun.a motion or gesture by which a thought is expressed or a command or wish made known

• signs include words, morphemes, and punctuation
• signs of success

noun.signal

• a sign of the times
• signs of an early spring

noun.a fundamental linguistic unit that designates an object or relation or has a purely syntactic function

• red fox sign

verb.cross

• sign a trail
• signed the contract

verb.to place a sign on or mark by signs

• sign a bill into law
• sign a confession

verb.to represent or indicate by a sign

• signed over his property to his brother
• Please sign your name here.