Definition of offlapping in US English:

offlapping

adjective

Geology
  • Forming an offlap; of lesser extent than underlying strata, which are thus uncovered at the margins.

Origin

Early 20th century; earliest use found in Amadeus William Grabau (1870–1946). From off- + lapping, after overlapping.

Pronunciation

offlapping

/ɒfˈlapɪŋ/