<p><strong>Verb</strong></p><ul><li>to flow or run over, as rivers or water: After the thaw, the river overflows and causes great damage.</li><li>to have the contents flowing over or spilling, as an overfull container: Stop pouring or your glass is going to overflow.</li><li>to pass from one place or part to another as if flowing from an overfull space: The population overflowed into the adjoining territory.</li><li>to be filled or supplied with in great measure: a heart overflowing with gratitude; a region overflowing with orchards and vineyards.</li></ul><p><strong>Noun</strong></p><ul><li>an overflowing: the annual overflow of the Nile.</li><li>something that flows or runs over: to carry off the overflow from a fountain.</li><li>a portion crowded out of an overfilled place: to house the overflow of the museum's collection in another building.</li><li>an excess or superabundance: an overflow of applicants for the job.</li><li>an outlet or receptacle for excess liquid: The tank is equipped with an overflow.</li></ul>