conflict

an open clash between two opposing groups (or individuals)

• “the harder the conflict the more glorious the triumph” -Thomas Paine
• “police tried to control the battle between the pro- and anti-abortion mobs”

opposition between two simultaneous but incompatible feelings

• “he was immobilized by conflict and indecision”

a hostile meeting of opposing military forces in the course of a war

• “Grant won a decisive victory in the battle of Chickamauga”
• “he lost his romantic ideas about war when he got into a real engagement”

a state of opposition between persons or ideas or interests

• “his conflict of interest made him ineligible for the post”
• “a conflict of loyalties”

an incompatibility of dates or events

• “he noticed a conflict in the dates of the two meetings”

opposition in a work of drama or fiction between characters or forces (especially an opposition that motivates the development of the plot)

• “this form of conflict is essential to Mann”

a disagreement or argument about something important

• “he had a dispute with his wife”
• “there were irreconcilable differences”
• “the familiar conflict between Republicans and Democrats”

be in conflict

• “The two proposals conflict!”

go against, as of rules and laws

• “He ran afould of the law”
• “This behavior conflicts with our rules”