IPA: /ˈpaɪkrʌst/
KK: /ˈpaɪkrʌst/
The outer layer or shell of a pie, usually made from pastry dough.
She rolled out the dough to make a perfect piecrust for the apple pie.
Piecrust → The word is formed from "pie" (from Old French *pye*, meaning a baked dish or pastry) and "crust" (from Latin *crusta*, meaning a hard outer layer). Together, these parts describe the hard outer layer of a baked pastry dish.
Think of a 'baked dish' ('pie') covered by a 'hard outer layer' ('crust') — that's what piecrust means.