all-out
1 of 2adjective
ˈȯl-ˈau̇t 
1
: made with maximum effort : thoroughgoing
an all-out effort to win the contest
2
: full-blown sense 2
all out
2 of 2adverb
: with full determination or enthusiasm : with maximum effort —used chiefly in the phrase go all out
Synonyms
Adjective
- absolute
- arrant
- blank
- blooming [chiefly British]
- bodacious [Southern & Midland]
- categorical
- categoric
- clean
- complete
- consummate
- crashing
- damn
- damned
- dead
- deadly
- definite
- downright
- dreadful
- fair
- flat
- flat-out
- out-and-out
- outright
- perfect
- plumb
- profound
- pure
- rank
- regular
- sheer
- simple
- stark
- stone
- straight-out
- thorough
- thoroughgoing
- total
- unadulterated
- unalloyed
- unconditional
- unmitigated
- unqualified
- utter
- very
Adverb
- full blast
- full tilt
- tooth and nail
See all Synonyms & Antonyms 
Example Sentences
Adverb went all out for her New Year's Eve party—she even had fireworks!
Recent Examples on the Web
Jolene Latimer, Peoplemag, 6 Sep. 2022 Go all out with your over-the-toilet storage by creating a floor-to-ceiling built-ins that surround the bowl. Mary Cornetta, Better Homes & Gardens, 25 Aug. 2022 Suffice it to say Country Living contributor Lauren Akins and her husband, country singer Thomas Rhett, go all out for October 31. Terri Robertson, Country Living, 18 Aug. 2022 Audrina Patridge is used to putting it all out there, between starring on MTV's The Hills from 2006 to 2010 and then its reboot, The Hills: New Beginnings, from 2019 to 2021. Christina Dugan Ramirez, PEOPLE.com, 22 July 2022 In fact my belief is that the ideal future people, who’ve really had time to figure it all out, might have moral views that are as alien to us as quantum mechanics is to Aristotle. Matt Reynolds, WIRED, 17 Aug. 2022 Just enough fruit flavors and aromas to remind you of the candies with some lingering watermelon, grapefruit and hop bitterness to round it all out. Blaine Callahan, Hartford Courant, 12 Aug. 2022 Beyoncé also went all out with her glam, opting for a sultry smoky eye accented with silver eyeliner and a glossy lip. Chelsey Sanchez, Harper's BAZAAR, 8 Aug. 2022 Ever the maximalist, Lipa went all out with her accessories. Chelsey Sanchez, Harper's BAZAAR, 27 July 2022 See More
Adverb
Aaron has been known to go all out with thoughtful, expressive gifts for Erica. Jolene Latimer, Peoplemag, 6 Sep. 2022 Go all out with your over-the-toilet storage by creating a floor-to-ceiling built-ins that surround the bowl. Mary Cornetta, Better Homes & Gardens, 25 Aug. 2022 Suffice it to say Country Living contributor Lauren Akins and her husband, country singer Thomas Rhett, go all out for October 31. Terri Robertson, Country Living, 18 Aug. 2022 Audrina Patridge is used to putting it all out there, between starring on MTV's The Hills from 2006 to 2010 and then its reboot, The Hills: New Beginnings, from 2019 to 2021. Christina Dugan Ramirez, PEOPLE.com, 22 July 2022 In fact my belief is that the ideal future people, who’ve really had time to figure it all out, might have moral views that are as alien to us as quantum mechanics is to Aristotle. Matt Reynolds, WIRED, 17 Aug. 2022 Just enough fruit flavors and aromas to remind you of the candies with some lingering watermelon, grapefruit and hop bitterness to round it all out. Blaine Callahan, Hartford Courant, 12 Aug. 2022 Beyoncé also went all out with her glam, opting for a sultry smoky eye accented with silver eyeliner and a glossy lip. Chelsey Sanchez, Harper's BAZAAR, 8 Aug. 2022 Ever the maximalist, Lipa went all out with her accessories. Chelsey Sanchez, Harper's BAZAAR, 27 July 2022 See More Word History
First Known Use
Adjective
1893, in the meaning defined at sense 1
Adverb
1840, in the meaning defined above
Kids Definition
all-out
adjective
ˈȯl-ˈau̇t
: as great as possible
We made an all-out effort to get there on time.
all-out 1 of 2
adjective
1
as in sheer
having no exceptions or restrictions Grandpa got the all-out support of the family when he decided to remarry at age 72 Synonyms & Similar Words
Relevance
- sheer
- utter
- unconditional
- complete
- absolute
- pure
- total
- outright
- simple
- definite
- perfect
- unmitigated
- very
- unadulterated
- deadly
- thoroughgoing
- downright
- damned
- damn
- out-and-out
- endless
- straight-out
- real
- regular
- flat-out
- crashing
- thorough
- unalloyed
- consummate
- categorical
- huge
- plumb
- dreadful
- profound
- constant
- stone
- unqualified
- stark
- blooming
- arrant
- fair
- blank
- genuine
- clean
- perpetual
- rank
- extreme
- bodacious
- unremitting
- categoric
- eternal
- flat
- classic
- veritable
- dead
- horrible
- authentic
- terrible
- unrestricted
- undying
- supreme
- hopeless
- extraordinary
- main
- habitual
- superlative
- inveterate
- terrific
- surpassing
- confirmed
- frightful
Antonyms & Near Antonyms
- doubtful
- questionable
- uncertain
- restricted
- dubious
- qualified
- equivocal
2
as in thorough
trying all possibilities an all-out effort to break open the door Synonyms & Similar Words
- thorough
- extensive
- complete
- sweeping
- comprehensive
- full-scale
- exhaustive
- total
- thoroughgoing
- out-and-out
- systematic
- clean
- general
- global
- wide
- methodical
- inclusive
- no-holds-barred
- in-depth
- broad
- unrestrained
- methodic
- wide-ranging
- far-reaching
- unhampered
Antonyms & Near Antonyms
- random
- haphazard
- desultory
- aimless
- superficial
- cursory
- limited
- hit-or-miss
- slipshod
- shallow
- restricted
- narrow
all out
2 of 2adverb
as in like crazy
with all power or resources being used went all out for her New Year's Eve party—she even had fireworks! Synonyms & Similar Words
- like crazy
- full blast
- full steam ahead
- to the hilt
- completely
- totally
- extremely
- exhaustively
- full tilt
- tooth and nail
- thoroughly
- in full career
- minutely
- fully
- utterly
- comprehensively
- detailedly
- roundly