A-frame Definition

āfrām
noun
A structure, such as a house, with steeply angled sides that meet at the top in the shape of the letter A.
American Heritage
A structure with such a framework.
Webster's New World

An architectural structure, in the shape of an "A", having two straight sides meeting at the top.

Wiktionary
adjective
Designating or of a structural framework, as of a house, with steeply angled sides meeting at the top like the sides of the letter A.
Webster's New World

Other Word Forms of A-frame

Noun

Singular:
A-frame
Plural:
a-frames