1
general::
1. Resume normal breathing after physical exertion of some kind, as in These stairs are steep; wait a minute till I catch my breath. This phrase once meant the same as HOLD ONE'S BREATH? that is, stop breathing momentarily? a usage no longer current. [Early 1800s] 2. Relax, take a rest, as in Events have been moving so fast I'd like to stop and catch my breath. [First half of 1900s]
American Heritage Idioms