Added 9 October 2026 staircase /ˈstɛɹˌkeɪs/ noun Categories: ThingsUncommon Words In Latin: scalaria Wiktionary noun ! Definition from Wiktionary (CC BY-SA). Pronunciation from Wiktionary, via Kaikki.org. More about staircase at Wordnik → Where our words come from → A flight of stairs; a stairway. A connected set of flights of stairs; a stairwell. A set of locks (enclosed sections of waterway) mounted one above the next. verb To modify (a signal, a graph, etc.) to reduce a smooth curve to a series of discrete steps. To increase one's share in a co-ownership. Related Words: stairsstairwaystepsstairstairwellladderflightfirelandingstepescalatorriser Back to today's word