<p><strong>Noun</strong></p><ul><li>an act or instance of following, obeying, or conforming to: the observance of traffic laws.</li><li>Synonyms: heedfulness, adherence, compliance.</li><li>a keeping or celebration by appropriate procedure, ceremonies, etc.: the observance of the Sabbath.</li><li>a procedure, ceremony, or rite, as for a particular occasion: patriotic observances.</li><li>a rule or custom to be followed or obeyed; a customary practice.</li><li>Roman Catholic Church: a rule or discipline for a religious house or order.</li><li>a house or order observing a rule or discipline.</li><li>an act or instance of watching, noting, or perceiving; observation.</li><li>respectful attention or service.</li><li>Archaic: courteous attention as to a person; dutiful service.</li></ul>