Tenor leading performers round Spain shut up in concert hall

• "Don't play," on a score
• Musical term for silence
• Musical direction for silence
• Silent, in music
• Be silent, on a score
• "Be silent," on a score

Wikipedia Word definitions in Wikipedia
Tacet is Latin for "it is silent". It is a musical term to indicate that an instrument or voice does not sound. In vocal polyphony and in orchestral scores, it usually indicates a long period of time, typically an entire movement . In more modern music ...

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
musical instruction, 1724, from Latin tacet "is silent," third person singular present indicative of tacere (see tacit ).

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Tacet \Ta"cet\, v. impers. [L., it is silent, 3d pers.pr. of tacere to be silent.] (Mus.) It is silent; -- a direction for a vocal or instrumental part to be silent during a whole movement.

Wiktionary Word definitions in Wiktionary
vb. (label en music) instruction indicating silence on the part of the performers of a piece