Main Entry: in·gress

Pronunciation: \ˈin-ˌgres\

Function: noun

Etymology: Middle English, from Latin ingressus, from ingredi

Date: 15th century

1 : the act of entering : entrance <the seal prevents ingress of moisture>
2 : the power or liberty of entrance or access <an area with restricted ingress>

— in·gres·sion \in-ˈgre-shən\ noun