theme
noun
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a unifying idea that is a recurrent element in literary or artistic work“It was the usual love story theme.”motif
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(linguistics) the form of a word after all affixes are removedstem
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an essay (especially one written as an assignment)composition
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the subject matter of a conversation or discussionsubject
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(music) melodic subject of a musical composition“the theme is announced in the first measures”idea
verb
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provide with a particular theme or motive“the restaurant often themes its menus”