fair play noun 1phrase 1 noun1 •Good behavior; conduct (in sports or another endeavor) that is respectful of the rules, the spirit of the activity, and the adversary. phrase1 •(UK, informal) used to acknowledge or congratulate for something.[S]he consolidated her position by purchasing the kennels, doing them up regardless of expense and buying two new horses, and, fair play to her, fair play, as they say in Wales, ... — 1964