1660s, "lines by which a figure is delineated," from out + line (v.). Meaning "rough draft in words" is from 1759.
outline (v.)
1790, "to draw in outline," from outline (n.). Meaning "to describe in general terms" is from 1855. Related: Outlined; outlining.
outlaw
outlawry
outlay
outlet
outlier
outline
outlive
outlook
outlying
outmoded
outness
