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Description: Define sign: a piece of paper, wood, etc., with words or pictures on it that gives information about something—usage, synonyms, more.
. something (such as an action or event) which shows that something else exists, is true, or will happen
1 a. a motion or gesture by which a thought is expressed or a command or wish made known b. signal 2a c. a fundamental linguistic unit that designates an object or relation or has a purely syntactic function <sign s include words, morphemes, and punctuation> d. one of a set of gestures used to represent language; also. sign language
2. a mark having a conventional meaning and used in place of words or to represent a complex notion
4 a (1). a character (as a flat or sharp) used in musical notation (2). segno b. a character (as ÷) indicating a mathematical operation; also. one of two characters + and − that form part of the symbol of a number and characterize it as positive or negative
5 a. a display (as a lettered board or a configuration of neon tubing) used to identify or advertise a place of business or a product b. a posted command, warning, or direction c. signboard
6 a. something material or external that stands for or signifies something spiritual b. something indicating the presence or existence of something else <sign s of success> <a sign of the times> c. presage. portent <sign s of an early spring> d. an objective evidence of plant or animal disease