Main Entry: equiv·a·lence

Pronunciation: \i-ˈkwiv-lən(t)s, -ˈkwi-və-\

Function: noun

Date: circa 1541

1 a : the state or property of being equivalent b : the relation holding between two statements if they are either both true or both false so that to affirm one and to deny the other would result in a contradiction
2 : a presentation of terms as equivalent
3 : equality in metrical value of a regular foot and one in which there are substitutions