<p><strong>Adjective</strong></p><ul><li>immediately following in time, order, importance, etc.: the next day; the next person in line.</li><li>nearest or adjacent in place or position: the next room.</li><li>nearest in relationship or kinship.</li></ul><p><strong>Adverb</strong></p><ul><li>in the place, time, importance, etc., nearest or immediately following: We're going to London next. This is my next oldest daughter.</li><li>on the first occasion to follow: when next we meet.</li></ul><p><strong>Preposition</strong></p><ul><li>adjacent to; nearest: It's in the closet next to the blackboard.</li></ul>