D defs.my
Entry 1 sense Webster, 1913

Stop-gap

/stäp'-găpˌ/ · Stop·-gap · IPA /stˈɑpɡˌæp/
01 n. That which closes or fills up an opening or gap; hence, a temporary expedient.
  1. 1.
    That which closes or fills up an opening or gap; hence, a temporary expedient.
    “Moral prejudices are the stop-gaps of virtue.” — Hare.