What does "uncap" mean?

To remove a physical cap or cover from.

Uncap

/ʌnˈkæp/ verb

verb ·Rare ·Advanced level

Verb

1
To remove a physical cap or cover from. transitive
"Then, with an opener, she uncapped both drinks."
2
To remove a cap or limit from. transitive
"to uncap the frame rate of a game console emulator"
3
To take off one's cap. intransitive

"Then, with an opener, she uncapped both drinks."

From un- + cap. Piecewise doublet of uncape.