Etymology

Noun

1. A clash or disagreement, often violent, between two opposing groups or individuals.

   The conflict between the government and the rebels began three years ago.

2. An incompatibility, as of two things that cannot be simultaneously fulfilled.

   I wanted to attend the meeting but there's a conflict in my schedule that day.

Verb

1. To be at odds (with); to disagree or be incompatible
2. To overlap (with), as in a schedule.

   Your conference call conflicts with my older one: please reschedule.