<p><strong>Noun</strong></p><ul><li>a book in which records of acts, events, names, etc., are kept.</li><li>a list or record of such acts, events, etc.</li><li>an entry in such a book, record, or list.</li><li>an official document issued to a merchant ship as evidence of its nationality.</li><li>registration or registry.</li><li>a mechanical device by which certain data are automatically recorded.</li><li>the compass or range of a voice or an instrument.</li><li>a part of this range produced in the same way and having the same quality.</li><li>a stop (in an organ).</li><li>a device for controlling the flow of warmed air or the like through an opening, as from a duct to an interior, composed of a number of narrow, parallel blades, usually behind a grating, that may be adjusted so as to overlap and close the opening.</li><li>proper relationship between two plane surfaces in photography, as corresponding plates in photoengraving.</li><li>a precise adjustment or correspondence, as of lines, columns, etc., especially on the two sides of a leaf.</li><li>correct relation or exact superimposition, as of colors in color printing.</li><li>a bookmark, especially a ribbon attached to the spine of a book.</li><li>a variety of language typically used in a specific type of communicative setting.</li><li>a high-speed storage location in the CPU, used to store a related string of bits, as a word or phrase.</li></ul><p><strong>Verb</strong></p><ul><li>to enter or cause to be entered formally in a register.</li><li>to indicate by a record, as instruments do.</li><li>to enroll (a student, voter, etc.) in a school or course of study, on the voting rolls, etc.</li><li>to adjust so as to secure exact correspondence; cause to be in register.</li><li>to show (surprise, joy, anger, etc.), as by facial expression or by actions.</li><li>to document (a merchant ship engaged in foreign trade) by issuing a certificate of registry.</li></ul>