<p><strong>Noun</strong></p><ul><li>an ornamental recess in a wall or the like, usually semicircular in plan and arched, as for a statue or other decorative object.</li><li>a place or position suitable or appropriate for a person or thing: to find one's niche in the business world.</li><li>a distinct segment of a market.</li><li>ecological niche (def).</li></ul><p><strong>Adjective</strong></p><ul><li>pertaining to or intended for a market niche; having specific appeal: niche advertising.</li></ul><p><strong>Verb</strong></p><ul><li>(used with object)<ul><li>niched, niching.</li><li>to place (something) in a niche.</li></ul></li></ul>