<p><strong>Noun</strong></p><ul><li>plural crises [krahy, -seez].</li><li>A stage in a sequence of events at which the trend of all future events, especially for better or for worse, is determined; turning point.</li><li>A condition of instability or danger, as in social, economic, political, or international affairs, leading to a decisive change.</li><li>A dramatic emotional or circumstantial upheaval in a person's life.</li><li>Medicine/Medical: the point in the course of a serious disease at which a decisive change occurs, leading either to recovery or to death.</li><li>The change itself.</li><li>The point in a play or story at which hostile elements are most tensely opposed to each other.</li></ul><p><strong>Adjective</strong></p><ul><li>Of, referring to, or for use in dealing with a crisis.</li></ul>