(number theory) A natural number that is abundant but not semiperfect; one for which the sum of the proper divisors (including 1 but not itself) is greater than the number, but no subset of those divisors sums to the number itself.

simple past tense and past participle of weird

Marked by weirdness; strange; mysterious.

present participle of weird

(slang) A strange, odd, eccentric person. / (slang) An insane, possibly dangerous person.

(transitive) To destine; doom; change by witchcraft or sorcery. / (transitive) To warn solemnly; adjure.

(archaic) Fate; destiny; luck. / A prediction. / (obsolete, Scotland) A spell or charm. / That which comes to pass; a fact. / (archaic, in the plural) The Fates (personified). / (informal) Weirdness.

Having an unusually strange character or behaviour. / Deviating from the normal; bizarre. / (archaic) Of or pertaining to the Fates. / (archaic) Connected with fate or destiny; able to influence fate.

(nonstandard) In a strange manner.

(slang, transitive) To make someone feel, by weirdness, uneasy or uncomfortable; to make one feel (that something is) weird.