The wingspan (or just span) of an airplane or a bird, is the distance from one wingtip to the other wingtip. For example, the Boeing 777 has a wingspan of about 60 metres (197 ft); and a Wandering Albatross (Diomedea exulans) caught in 1965 had a wingspan of 3.63 metres (11 ft 11 in), the official record for a living bird.
The term wingspan, more technically extent, is also used for other winged animals such as pterosaurs, bats, insects, etc., and other winged aircraft such as ornithopters.
Read more about Wingspan: Wingspan of Aircraft, Wingspan of Flying Animals, Armspan in Sports (Commonly Also Called Wingspan)