by
prepositionDefinition of by
(Entry 1 of 5)
1
: in proximity to : near
standing by the window
2a
: into the vicinity of and beyond : past
went right by him
b
: through or through the medium (see medium entry 1 sense 2) of : via
enter by the door
c
: in the direction of : toward
sailed north by east
3a
: during the course of
studied by night
b
: not later than
be there by 2 p.m.
4a
: through the agency (see agency sense 3) or instrumentality of
a poem written by Keats death by firing squad taken by force happened by luck
b
: born or begot of
had two sons by his first wife one child by her second husband
c
: sired or borne by
having foals by champion race horses
5
: with the witness or sanction (see sanction entry 1 sense 4c) of
swear by all that is holy
6a
: in conformity with
acted by the rules
b
: according to
called her by name sold by the pound
7
—used as a function word in multiplication, in division, and in measurements divide a by bmultiply 10 by 4a room 15 feet by 20 feet
8a
: with respect to
a lawyer by profession
b
: on behalf of
did right by his children
9
: in or to the amount or extent of
win by a nose
10
—used as a function word to indicate successive units or increments little by littlewalk two by two
11
: in the opinion of : from the point of view of
OK by me
by
adverbDefinition of by (Entry 2 of 5)
by
noun
variants:
or bye
Definition of by (Entry 3 of 5)
: something of secondary importance : a side issue
by the by
by
adjective
variants:
or bye
Definition of by (Entry 4 of 5)
1
: being off the main route : side
a by passage
2
: incidental
by effects
by
interjection
variants:
or bye
Definition of by (Entry 5 of 5)
—used to express farewell —often used with following now
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