I. wi-ˈthau̇t, -ˈthau̇t preposition
Etymology: Middle English withoute, from Old English withūtan, from with + ūtan outside, from ūt out — more at out
Date: before 12th century
1. : outside
2. — used as a function word to indicate the absence or lack of something or someone
fight without fear
left without him
looks without seeing
II. adverb
Date: before 12th century
1. : on the outside : externally
2. : with something lacking or absent
has learned to do without
III. conjunction
Date: 14th century
chiefly dialect : unless
you don't know about me without you have read a book — Mark Twain
IV. noun
Date: 15th century
: an outer place or area
came from without