Ma'anar ƙamus na "signalization" yana nufin aiki ko tsari na shigarwa, kafa, ko kiyaye tsarin sigina, kamar siginar zirga-zirga ko siginar jirgin ƙasa, don sauƙaƙe tafiya cikin tsari da aminci na motoci ko mutane. Hakanan yana iya komawa zuwa amfani da sigina ko alamu don isar da bayanai ko kwatance. Gabaɗaya, sigina shine tsari da sarrafa tsarin sigina don tabbatar da ingantaccen sadarwa da daidaitawa.