Synonyms for sign

noun

• structure displaying a board on which advertisements can be posted
• a perceptible indication of something not immediately apparent (as a visible clue that something has happened)
• any nonverbal action or gesture that encodes a message
• an event that is experienced as indicating important things to come
• (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)
• a character indicating a relation between quantities
• a fundamental linguistic unit linking a signifier to that which is signified
• a gesture that is part of a sign language
• a public display of a message
• (medicine) any objective evidence of the presence of a disorder or disease

verb

• mark with one's signature; write one's name (on)
• make the sign of the cross over someone in order to call on God for protection; consecrate
• engage by written agreement
• approve and express assent, responsibility, or obligation
• communicate silently and non-verbally by signals or signs
• be engaged by a written agreement
• communicate in sign language
• place signs, as along a road

adjective

• used of the language of the deaf