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's writing"

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 afoul of the law"; "This behavior conflicts with our rules"