They [tape recorders] can be turned off while officers are on meal or in the car to protect their private conversations […]

For examples of the usage of this term see the citations page.

Pearlie has managed to acquire a phone that purrs, but doesn’t ring; she has found a breed of barkless dog; she censors the newspapers by cutting out upsetting articles.

Grind with strong arm, the circling chertz betwixt, / Your pure Ka-o-lins and Pe-tun-tses mixt […] .