To make something seem less important, serious, or significant than it really is; to understate or minimize.
2.
Globalinformalpejorative
To lower one's presentation or standards in order to appeal to a less demanding audience; to pander to the lowest common denominator (often expressed as 'play down to').
3.
USUKneutral
To perform (music or entertainment) at a particular venue or location, typically one considered less prominent (as in 'play down at/there').
4.
Globalneutralmusical
To lower the pitch, volume, or emphasis of a musical line or vocal part so that it is less prominent.