Definition of longitude
1a
: angular distance measured on a great circle of reference from the intersection of the adopted zero meridian with this reference circle to the similar intersection of the meridian passing through the object
b
: the arc or portion of the earth's equator intersected between the meridian of a given place and the prime meridian and expressed either in degrees or in time
2
archaic
: long duration
Test Your Vocabulary
Eponyms: Words Named After People
-
- What is the best definition of boycott?

Can you spell these 10 commonly misspelled words?
TAKE THE QUIZ
A daily challenge for crossword fanatics.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridged
Share longitude
Time Traveler for longitude
The first known use of longitude was in the 15th century
See more words from the same century