sound barrier

Definition

Sonic barrier, the sudden increase in drag (resistance) and other effects experienced by moving objects when their speed approaches that of sound or becomes supersonic (which used to be considered a barrier to higher speeds).

Example Sentences

• "St Ives: The guided busway on the old railway alignment to Cambridge has just passed its tenth anniversary. Railfuture has noted its down-at-heel physical appearance, with dirty concrete beams, damaged sound barriers, and unmanaged vegetation."