a any thing, matter, person, etc., that is difficult to deal with, solve, or overcome
b (as modifier)
a problem child
2 a puzzle, question, etc., set for solution
3 (Maths) a statement requiring a solution usually by means of one or more operations or geometric constructions
4 modifier designating a literary work that deals with difficult moral questions a problem play (C14: from Late Latin problema, from Greek: something put forward; related to proballein to throw forwards, from pro-2 + ballein to throw)
n the traditional philosophical problem concerning the nature of mind, body, and the relationship between them
identity theory →
English Collins Dictionary - English Definition & Thesaurus
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"Collins English Dictionary 5th Edition first published in 2000 © HarperCollins Publishers 1979, 1986, 1991, 1994, 1998, 2000 and Collins A-Z Thesaurus 1st edition first published in 1995 © HarperCollins Publishers 1995"