Definition of all-pass in English:

all-pass

adjective

Electronics
  • Designating a filter that attenuates signals of all frequencies equally but introduces a frequency-dependent phase shift; of or relating to such a filter.

Origin

1930s; earliest use found in Bell System Technical Journal. From all + pass.

Pronunciation

all-pass

/ˌɔːlˈpas//ˌɔːlˈpɑːs/