What is the meaning of Sign?

A visible fact that shows that something exists or may happen.

An omen.

A property of the body that indicates a disease and, unlike a symptom, can be detected objectively by someone other than the patient.

A mark or another symbol used to represent something.

Physical evidence left by an animal.

A clearly visible object, generally flat, bearing a short message in words or pictures.

A wonder; miracle; prodigy.

An astrological sign.

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.

Sign language in general.

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.

A military emblem carried on a banner or standard.

To make a mark

1. To seal (a document etc.) with an identifying seal or symbol.

   To seal (a document etc.) with an identifying seal or symbol.

   To mark, to put or leave a mark on.

   To validate or ratify (a document) by writing one's signature on it.

   More generally, to write one's signature on (something) as a means of identification etc.

   To write (one's name) as a signature.

   To write one's signature.

   To finalise a contractual agreement to work for a given sports team, record label etc.

   To engage (a sports player, musician etc.) in a contract.

   To make the sign of the cross

   1. To bless (someone or something) with the sign of the cross; to mark with the sign of the cross.
   2. To cross oneself.

   To bless (someone or something) with the sign of the cross; to mark with the sign of the cross.

   To cross oneself.

   To indicate

   1. To communicate using a gesture or signal.
   2. To communicate or make known (a meaning, intention, etc.) by a sign.
   3. To communicate using gestures to (someone).

      To communicate using a gesture or signal.

      To communicate or make known (a meaning, intention, etc.) by a sign.

      To communicate using gestures to (someone).

      To use sign language.

      To furnish (a road etc.) with signs.

      To determine the sign of

      1. To calculate or derive whether a quantity has a positive or negative sign.

      To calculate or derive whether a quantity has a positive or negative sign.

      Source: wiktionary.org