Share this entry
Aldis lamp Line breaks: Aldis lamp
Pronunciation: /ˈɔːldɪs/

Definition of Aldis lamp in English:


A handheld lamp for signalling in Morse code.
Example sentences
  • We flew just below cloud level, at 600 ft, until we spotted HMS Sheffield, which signalled to us with an Aldis lamp, giving us the bearing and the distance of the Bismarck.
  • Ships also use flashing lights between vessels - the Aldis lamp - as another means of semaphore signalling.
  • As we turned to the right downwind, I briefed the copilot to look for our clearance-to-land via the green Aldis lamp from the tower, since we had no radios.


First World War: named after Arthur C. W. Aldis (1878–1953), its British inventor.

Definition of Aldis lamp in:
Share this entry

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.

Subscribe to remove adverts and access premium resources