This tool relates English terms to concepts from the
SUMO
ontology by means of mappings to
WordNet synsets.
According to WordNet, the noun "sign" has 11 sense(s).
113856574 having an indicated pole (as the distinction between positive and negative electric charges); "he got the polarity of the battery reversed"; "charges of opposite sign".
106646243 a perceptible indication of something not immediately apparent (as a visible clue that something has happened); "he showed signs of strain"; "they welcomed the signs of spring".
107276018 a fundamental linguistic unit linking a signifier to that which is signified; "The bond between the signifier and the signified is arbitrary"--de Saussure.