Signalling vs. Signaling
“Signalling” and “signaling” are regional spelling variants of the same verb and noun forms. British English normally doubles the l, while American English normally uses one l. Match the spelling system used elsewhere in your document.
Use “signalling” in British-oriented spelling and “signaling” in American-oriented spelling. Both represent the same word; consistency is more important than mixing regional systems.
Key details
Further guidance
American
Use “signaling” when following American spelling conventions.
British
Use “signalling” when following British spelling conventions.
Consistency
Apply the same regional spelling policy to related forms throughout a document.
Sources and evidence
Sources are shown with the role they play in this guide. Historical or style-sensitive claims are kept within the evidence boundary described above.
- Signaling definition and meaning (opens in a new tab)HarperCollins Publishers · Current dictionary evidence distinguishing British signalling and US signaling spelling