Word family noun sign signal signatory signature signing signaller adjective signed ≠ unsigned verb sign signal adverb signally
From Longman Dictionary of Contemporary Englishsignallersig‧nal‧ler /ˈsɪɡnələ $ -ər/ noun [countable] British English a signalman(2)Examples from the Corpus
signaller• In one case a signaller worked 30 consecutive days.• Being explicit about internal state is an obvious advantage to the signaller as well as to the receiver. 