Changes
Sign
,specified that notices containing an advertisement, bearing, direction or warning that is in public view, e.g. road signs, are actually symbols of meaning. Also added smoke as reliable sign of hidden presence of burning heat or fire
A '''sign''' is a token or indication of something. It may be an [[action]], [[event]], [[object]] or [[pattern]] that conveys a [[meaning]] or a [[symbol]]ic notice containing an [[advertisement]], [[bearing]], [[direction]] or [[warning]] that is in public view; e.g. road signs.
Sign may also refer to the [[evidence]] of existence; as in "he showed signs of [[life]]" or "there was no sign of them anywhere". Smoke is a reliable sign of the hidden presence of burning heat or fire. [[Catholic]]s, for example, see the [[Transubstantiation|consecrated]] forms of the bread and wine as actual signs of the real presence of [[Jesus Christ]] himself, not simply as being only representative [[symbol]]s.
In [[mathematics]], signs can refer to the [[symbol]]s of [[addition]], [[subtraction]], [[multiplication]] and [[division]] as well as some more advanced operations. The sign of a [[number]] refers to whether it is [[positive]] or [[negative]].
