<p><strong>Noun</strong></p><ul><li>an act or instance of noticing or perceiving.</li><li>an act or instance of regarding attentively or watching.</li><li>the faculty or habit of observing or noticing.</li><li>an act or instance of viewing or noting a fact or occurrence for some scientific or other special purpose.</li><li>a remark, comment, or statement based on what one has noticed or observed.</li><li>the condition of being observed.</li><li>the measurement of the altitude or azimuth of a heavenly body for navigational purposes.</li></ul><p><strong>End of Response</strong></p>