n.
Function: verb
Inflected Form: ri · valed or ri · valled ; ri · val · ing or ri · val · ling \ ' r ī v-( ə -)li ŋ \
Date: 1605
intransitive verb : to act as a rival : COMPETE
transitive verb
1 : to be in competition with
2 : to strive to equal or excel : EMULATE
3 : to possess qualities or aptitudes that approach or equal (those of another)