An authentic signature; (especially), the signature of a sovereign, used to validate a formal document.

(medicine) The presence of Koplik's spots.

Having imperfect eyesight

a set of techniques and tools for process improvement.

An island, a terra nullius in Gornja Siga, in the Danube, Europe, on the border between Croatia and Serbia

(Internet) Data used by a signatory to sign something electronically. It may involve cryptography or may simply be a name typed into a document.

(rail transport) A signal set at danger and showing a red light or other stop indication, which a train driver must not pass until it changes or until manually cleared past the signal by a dispatcher.

(economics) A sign, attached to a commodity and concerning its price, that is intended to increase demand for it

(archaic) myopia

plural of signal pistol