This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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adj. Not likely; improbable.

adj. Not promising; likely to fail.

adj. Not likely; improbable; not to be reasonably expected; as, an unlikely event; the thing you mention is very unlikely. Not holding out a prospect of success; likely to fail; unpromising; as, unlikely means.

ad. In an improbable manner.

n. Something or somebody considered unlikely.

adj. Not likely; improbable; not to be reasonably expected

adj. Not holding out a prospect of success; likely to fail; unpromising.

adj. Not such as to inspire liking; unattractive; disagreeable.

ad. In an unlikely manner.

Such as cannot be reasonably expected; improbable: as, an unlikely event.

Not holding out a prospect of success or of a desired result; likely to fail; unpromising.

Not calculated to inspire liking or affection; not likable or lovable.

In an unlikely manner; with no or little likelihood; improbably.

adj. not likely to be true or to occur or to have occurred

adj. having a probability too low to inspire belief

adj. has little chance of being the case or coming about

"And still: in 2011, the term "unlikely" doesn't quite carry the weight it used to."

supposed    implausible    last    farfetched    remote    outside   

improbable    unpromising    unattractive    disagreeable   

likely   

improbable    likely    bizarre    fortunate    unpleasant    impossible    risky    plausible    fantastic    excite