dedicatory UK /ˈdɛdɪˌkeɪtɹi/US /ˈdɛdəkəˌtɔɹi/adjective 1noun 1forms 1 adjective1 •Of or pertaining to dedication. noun1 •A dedication.[…] I conceit him to be neere a kin to him who set forth a Passion Sermon with a formall Dedicatory in great letters to our Saviour. — 1642 formsdedicatories