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9,359 words — headwords with part of speech, pronunciation, and a plain-language definition.

as soon as one arrives, as soon as one gets home; off the cuff, without preparation; unexpectedly, without warning
au début
adverb
initially, at first
originally, initially
au détour de
preposition
during, in the course of
au détriment de
preposition
to the detriment of, at the expense of (someone), at the cost of (something)
au fait
adjective
au fait
au fait
adverb
by the way
by ear, by the seat of one's pants, by guesswork
au feu
interjection
fire! (A cry of distress indicating that something is on fire)
figuratively, in the figurative sense
au fil de
preposition
in the course of, over the course of
as one goes along
au final
adverb
in the end, after all, eventually, finally
au fond
adverb
Used other than figuratively or idiomatically: see at the back, in the depths.; deep down, in the end; deep down, at bottom, at heart
au four
adverb
in the oven
au four
adjective
baked (cooked in an oven)
in keeping with (progressively, in sequence)
bit by bit, gradually; as one goes along
au galop
adverb
at a gallop; at a gallop, quickly
au goût de
preposition
in line with someone's tastes
in fashion, in line with current tastes
to the great displeasure of
at full gallop; at full tilt, at full pelt, at top speed
never ever
in broad daylight, in the open
tops, at most
to the great displeasure of
in broad daylight, in the open
au gré de
preposition
in the course of, over the course of
au hasard
adverb
randomly, at random (by using random selection); to and fro, here and there, hither and thither
as of today, as things currently stand; at the present time
from day to day, one day at a time, hand-to-mouth
au jugé
adverb
by ear, by the seat of one's pants, by guesswork, at first glance
au juste
adverb
exactly, precisely
au large
adverb
offshore, out to sea
au large de
preposition
off the coast of
au lendemain de
preposition
after, (soon) following
au lieu de
preposition
Used other than figuratively or idiomatically: see au, lieu, de.; instead of
au lit
adverb
Used other than figuratively or idiomatically: see au, lit.; in bed
au lit
interjection
to bed! off to bed! sleepy time!
au long de
preposition
during; throughout
at most, a maximum; to the maximum, maximally (as much as possible)
au meurtre
interjection
murder! murderer!
au mieux
adverb
at best; best-case scenario
in the middle of
in the sticks, in the middle of nowhere
at least
au moins
adverb
at least, at a minimum
au moment où
conjunction
as, when, as soon as
au motif que
conjunction
arguing that, on the grounds that, on the pretext that
au moyen de
preposition
by means of (by using the thing specified)
as well as
naturally; in the nude; most simply, most plainly (in the plainest or simplest manner); without seasoning, flavouring or dressing; proper
right under someone's nose
au nom de
preposition
on behalf of (speaking or acting for); in the name of
in the name of the law
au nom du ciel
interjection
in heaven's name!
au nombre de
preposition
numbering; among
au pair
adjective
working for food and housing
au parfum
adjective
in the know, in the picture; up to speed