Sign - definition of sign by The Free Dictionary syn: sign, omen, portent refer to something that gives evidence of a future event sign is a general word for a visible trace or indication of an event, either past, present, or future: Dark clouds are a sign of rain
Sign - Wikipedia A sign is an object, quality, event, or entity whose presence or occurrence indicates the probable presence or occurrence of something else [1] A natural sign bears a causal relation to its object—for instance, thunder is a sign of storm, or medical symptoms a sign of disease
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