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Definitions

ill-conceived

[il-kuhn-seevd] / ˈɪl kənˈsivd /
ADJECTIVE
crazy
Synonyms
STRONGEST
absurd bizarre foolish goofy insane irresponsible ludicrous odd outrageous preposterous ridiculous silly strange weird
STRONG
eccentric loony wild
WEAK
balmy beyond all reason cockeyed derisory fatuous foolhardy half-baked harebrained idiotic impracticable imprudent inane inappropriate nonsensical out of all reason peculiar puerile quixotic senseless short-sighted unworkable
Antonyms
STRONGEST
logical normal rational reasonable sensible usual
WEAK
balanced believeable realistic responsible sane
ADJECTIVE
half-baked
Synonyms
STRONGEST
idiotic witless
WEAK
backward batty birdbrained blockheaded boneheaded brainless crazy dumb foolish harebrained ignorant impractical indiscreet poorly planned senseless short-sighted silly sophomoric underdeveloped unformed
Antonyms
WEAK
intelligent smart thoughtful wise

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Will the ship’s captain continue on his ill-conceived scientific voyage after his encounter with man and monster?

From The Wall Street Journal • Nov. 6, 2025

There were high-profile stumbles, including jettisoning staff of the tiny Turner Classic Movies channel and an ill-conceived rebrand of its streamer to “Max” before changing the name back to HBO Max.

From Los Angeles Times • Oct. 30, 2025

One trusts FIA president Mohammed Ben Sulayem, whose crusade against bad language is regarded as ill-conceived and poorly handled by most in F1, will decide not to pursue it on this occasion.

From BBC • Feb. 18, 2025

As Reisner details in Cadillac Desert, in the late 1970s, President Jimmy Carter tried to kill 18 dam projects that seemed especially ill-conceived.

From Slate • Aug. 28, 2024

In fact, much as I admired his planning and pluck, his trip seemed frighteningly ill-conceived.

From "Geeks: How Two Lost Boys Rode the Internet Out of Idaho" by Jon Katz

Vocabulary lists containing ill-conceived

Internment

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The Faithful Spy

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Moon Over Manifest

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