Ma'anar ƙamus na kalmar "signaller" shine mutumin da ya aika ko karɓar sigina, yawanci a yanayin aikin soja ko na jirgin ƙasa. A cikin mahallin soja, mai sigina yana da alhakin watsa saƙonni ta amfani da hanyoyi daban-daban na sigina, kamar tutoci, fitilu, rediyo, ko siginar hannu. A cikin mahallin layin dogo, mai sigina ne ke da alhakin sarrafa motsin jiragen ƙasa ta hanyar aikawa da karɓar sigina ta amfani da tsarin sigina daban-daban, kamar siginar gefen hanya, sadarwar rediyo, ko na'ura mai kwakwalwa.