Definitions:

1. A direct confrontation or contest between two opposing sides. NOUN
   • There was a tense face-off between the protesters and the police.
2. To engage in a confrontation, competition, or direct contest. VERB
   • The two candidates will face-off in tonight's debate.

Synonyms:

• challenge
• clash contest
• compete
• confront
• confrontation
• encounter
• showdown