a. [f. ECHO + -LESS.] That has no echo; chiefly poet. or rhet. in the sense ‘silent, noiseless.’

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1728.  Monthly Review, XXVI. 503. An aerial telegraph … by means of which the voyagers [in balloons] can talk with each other in the echoless space.

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1816.  Byron, Prometh., 14. The suffocating sense of woe, Which speaks but in its loneliness … nor will sigh Until its voice is echoless.

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1825.  Blackw. Mag., XVIII. 440. It shows indeed no unfit haunting place For things of echoless footstep.

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1868.  Adah I. Menken, Infelicia, 3. That far off, echoless promise.

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  b.  fig. That gives no echo; unresponsive.

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1868.  Browning, Ring & Bk., X. 553. Father and mother stunned, and echoless To the blow.

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