a. The generally triangular section of wall at the end of a pitched roof, occupying the space between the two slopes of the roof.
b. The whole end wall of a building or wing having a pitched roof.
2. A triangular, usually ornamental architectural section, as one above an arched door or window.
[Middle English gable, gavel, from Norman French gable (perhaps of Celtic origin) and from Old Norse gafl; see ghebh-el- in the Appendix of Indo-European roots.]
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