conventional sign con·ven·tion·al sign (kən-věn'shə-nəl)
Any of various signs, such as words or symbols, that acquire their function through linguistic custom.
Schmidt smiled again as he set his teaspoon across his cup, the conventional sign that he wished no more tea.
It is probably a conventional sign, and not a phonetic character.
The conventional sign for a bridge is shown where the railroad crosses Sandy Creek on a trestle.
The Crow replied by making the conventional sign for good, adding to it that for truth.
Thereupon there were three raps—the conventional sign of assent—from the bottom of the carriage.
Everything is done in pantomime in Naples, and that is the conventional sign for hunger.
In return she pointed to the west again, made the conventional sign for night and sleep, and began to count her fingers.
On certain appointed days the statue of the god made some conventional sign to indicate his approval and assent.
The first, as all are aware, is only a conventional sign and presumably not phonetic.