sustaining ppl adjective. [sǝ'steɪnɪŋ] LME.
[from SUSTAIN verb + -ING².]
That sustains something.
sustaining pedal Music (a) a piano pedal (usu. the right-hand one) that sustains the notes by keeping all the dampers raised when the keys are released (also called damper pedal, loud pedal); (b) a third (middle) pedal on some pianos that sustains only those notes played just before its depression. sustaining programme US a radio or television programme without a commercial sponsor.

■ sustainingly adverb M17.

[TahlilGaran] English Dictionary ▲