underlap

/ˈʌndərˌlæp/
verb
  1. To extend or lie partly under something, especially in a way that creates a gap or overlap.
    • The technician adjusted the shingles so they underlap properly along the roof edge.
    • In the design, the upper panel should underlap the lower one by two inches.
    • The tiles underlap each other to prevent water from seeping through.
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Antonyms
noun
  1. A condition or area where one thing extends under another, often leaving a gap or insufficient coverage.
    • There was a small underlap in the carpet where the two pieces met.
    • Engineers measured the underlap between the two metal sheets to ensure a tight seal.
    • The underlap in the roofing caused a leak during the storm.
Antonyms
What does "underlap" mean? | whatsthatwordmean | whatsthatwordmean