Princeton's WordNet

1. foreground, highlight, spotlight, play up(verb)

   move into the foreground to make more visible or prominent

   "The introduction highlighted the speaker's distinguished career in linguistics"

2. cozy up, cotton up, shine up, play up, sidle up, suck up(verb)

   ingratiate oneself to; often with insincere behavior

   "She is playing up to the chairman"

Kernerman English Learner's Dictionary

1. play up(verb)ɪ

   to make sth seem important

   He played up the program's faults to get support for his new plan.

Wiktionary

1. play up(Verb)

   To misbehave

2. play up(Verb)

   To make or attempt to make something appear more important, likely or obvious; to showcase or highlight

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