broad (adj.)

Old English brad "wide, not narrow," also "flat, open, extended," from Proto-Germanic *braidi- (source also of Old Frisian bred, Old Norse breiðr, Dutch breed, German breit, Gothic brouþs), which is of unknown origin. Not found outside Germanic languages. There is no clear distinction in sense from wide. Of day or daylight, late 14c.; of speech or accents, 1530s. Related: Broadly; broadness.

broad (n.)

c. 1300, "breadth" (obsolete), from broad (adj.). Sense of "shallow, reedy lake formed by the expansion of a river over a flat surface" is a Norfolk dialect word from 1650s. Meaning "the broad part" of anything is by 1741.

Slang sense of "woman" is by 1911, perhaps suggestive of broad hips, but it also might trace to American English abroadwife, word for a woman (often a slave) away from her husband. Earliest use of the slang word suggests immorality or coarse, low-class women. Because of this negative association, and the rise of women's athletics, the track and field broad jump (1863) was changed to the long jump c. 1967.

Definitions of broad
broad (adj.)
being at a peak or culminating point;
broad daylight
Synonyms: full
broad (adj.)
broad in scope or content; "a panoptic study of Soviet nationality"- T.G.Winner;
an invention with broad applications
Synonyms: across-the-board / all-embracing / all-encompassing / all-inclusive / blanket / encompassing / extensive / panoptic / wide
broad (adj.)
having great (or a certain) extent from one side to the other;
broad shoulders
a river two miles broad
a broad river
Synonyms: wide
broad (adj.)
not detailed or specific;
a broad rule
the broad outlines of the plan
Synonyms: unspecific
broad (adj.)
lacking subtlety; obvious;
gave us a broad hint that it was time to leave
Synonyms: unsubtle
broad (adj.)
very large in expanse or scope;
a broad lawn
Synonyms: spacious / wide
broad (adj.)
(of speech) heavily and noticeably regional;
a broad southern accent
broad (n.)
slang term for a woman;
a broad is a woman who can throw a mean punch