organizer

plural organizers · alternative organiser

1. A person who arranges the details of a public event.

   1 more example

   Jennifer Pastore Monroy, executive director of the National Association of Productivity and Organizing Professionals, emphasized that “the relationship that clients build with a professional organizer is a very personal one, and so your experience will depend on what you’re trying to get out of it.” […] “Professional organizers and productivity consultants work a whole spectrum of services to help people,” she explained.

   2019 January 16, Jolie Kerr, “What Professional Organizers Really Do, and How They Can Help You”, in The New York Times

2. computingA hand-held micro-computer that will perform specific tasks; can be used as an electronic diary, alarm clock, recorder of memos and notes, a portable database etc.

   I'll add that meeting to my organizer.

3. A non-electronic notebook or calendar or something similar, used to organize one's affairs.
4. medicineA group of cells that, together with the evocator, control differentiation in the embryo; the inductor
5. a recipient, such as a box or a case, used for storing gadgets, trinkets and other knick-knacks; an organizer box

   desk organizer

   1 more example

   makeup organizer