A clash or disagreement, often violent, between two or more opposing groups or individuals.
An incompatibility, as of two things that cannot be simultaneously fulfilled.
To overlap (with), as in a schedule.
To be at odds (with); to disagree or be incompatible
A dispute between two parties, particularly an entrenched, back-and-forth dispute.
A game or competition in which two teams pull or tug on opposite ends of a rope trying to force the other team over the line which initially marked the middle between the two teams.