tock
n. countable B2 Upper Intermediate US //ˈtɑk// tock
n. the second sound in the ticking of a clock, coming right after the tick. It is the sound that marks the end of a second.
n. the second of the two sounds produced by a clock's escapement mechanism, following the tick. Often used in the compound 'tick-tock' to represent the passage of time.
The clock's tock echoed through the empty room.
The rhythmic tick-tock of the grandfather clock was the only sound in the silent library.
As the final exam approached, the steady tock of the wall clock seemed to grow louder, heightening the tension among the students waiting for the bell to ring.