What is a synonym for "flat-out"?

Common synonyms include: absolute, absolutely, all ends up, all out, altogether, apace.

Flat-out

adj, adv

adj, adv ·Uncommon ·Advanced level

Definitions

Adjective

1
Alternative form of flat out. alt-of, alternative

Adverb

1
Alternative form of flat out. alt-of, alternative
"Unlike Bing, GPT-4 usually flat-out refused to take the bait when I tried to get it to talk about consciousness, or get it to provide instructions for illegal or immoral activities, and it treated sensitive queries with kid gloves and nuance."

Synonyms

All synonyms

absolute absolutely all ends up all out altogether apace

Antonyms

All antonyms

partly

Example

More examples

"Unlike Bing, GPT-4 usually flat-out refused to take the bait when I tried to get it to talk about consciousness, or get it to provide instructions for illegal or immoral activities, and it treated sensitive queries with kid gloves and nuance."

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.