sign

adjective

noun

structure displaying a board on which advertisements can be posted
“the highway was lined with signboards”
signboard
a perceptible indication of something not immediately apparent, as a visible clue that something has happened
“We showed signs of strain after over 30 hours in transit.”
mark
any nonverbal action or gesture that encodes a message
“signals from the boat suddenly stopped”
signal
a public display of a message
“I 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

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

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

polarity
any objective evidence of the presence of a disorder or disease
“There were no signs of asphyxiation.”

verb

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

bless
be engaged by a written agreement
“Our band signed to play three shows this month.”
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

autographsubscribeinscribe
communicate silently and non-verbally by signals or signs
“They signed their disapproval with a dismissive hand gesture.”
signal
place signs, as along a road
“sign an intersection”
engage by written agreement
“They signed two new pitchers for the next season”
contract
approve and express assent, responsibility, or obligation

ratify