1. (medicine) any objective evidenc

1. (medicine) any objective evidence of the presence of a disorder or disease;
there were no signs of asphyxiation
2. a fundamental linguistic unit linking a signifier to that which is signified;
The bond between the signifier and the signified is arbitrary
--de Saussure
3. a gesture that is part of a sign language
4. a character indicating a relation between quantities;
don't forget the minus sign
5. a public display of a message;
he posted signs in all the shop windows
6. synonyms: sign, mark, a perceptible indication of something not immediately apparent (as a visible clue that something has happened)