Positive or negative polarity, as denoted by the + or - sign.
A specific gesture or motion used to communicate by those with speaking or hearing difficulties; now specifically, a linguistic unit in sign language equivalent to word in spoken languages.
A semantic unit, something that conveys meaning or information (e.g. a word of written language); a unit consisting of a signifier and a signified concept.
From Middle English signe, sygne, syng, seine, sine, syne, from Old English seġn and Old French signe, seing; both from Latin signum; root uncertain. signum. Partially displaced native token.
From Middle English signen, seinen, seinien, partly from Old English seġnian and partly from Anglo-Norman en, seiner et al., Old French signer et al., and their source Latin signare ("to mark, seal, indicate, signify"); all from Latin signum ("a mark, sign"); see Etymology 1, above. Compare sain.
Modern English dictionary
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