Register  —n. 1 official list, e.g. Of births, marriages, and deaths, of children in a class, of shipping, of professionally qualified persons, or of qualified voters in a constituency. 2 book in which items are recorded for reference. 3 device recording speed, force, etc. 4 a compass of a voice or instrument. B part of this compass (lower register). 5 adjustable plate for widening or narrowing an opening and regulating a draught, esp. In a fire-grate. 6 a set of organ pipes. B sliding device controlling this. 7 = *cash register. 8 form of a language (colloquial, literary, etc.) Used in particular circumstances. 9 computing a memory location having specific properties and quick access time. —v. 1 set down (a name, fact, complaint, etc.) Formally; record in writing. 2 enter or cause to be entered in a particular register. 3 commit (a letter etc.) To registered post. 4 (of an instrument) record automatically; indicate. 5 a express (an emotion) facially or by gesture (registered surprise). B (of an emotion) show in a person's face or gestures. 6 make an impression on a person's mind. [latin regero -gest- transcribe, record]