plural organizers
Definition of organizer
1
: a person or thing that organizes something: such as
a
: a person who arranges something (such as an event) especially by systematic planning and by coordinating the efforts of others
the organizers of the festival Community organizers have scheduled other events around the city this weekend to celebrate Martin Luther King Jr. Day. For example, on Sunday the Town Hall will host "Writers Resist," at which more than a dozen writers will read their own work and pieces from celebrated American rights activists.— Jessica Lee
b
: something (such as a device or container) that is designed to keep objects or information in a particular arrangement or order
a closet organizer The digital diary a.k.a the electronic organizer was popular in the '80s and '90s. It was a calculator, address book and notepad all-in-one.— Rill Causey and Sam Reichman We discovered that one of the firms still mailed tax organizers to clients in January. While they didn't really expect their clients to fill out the paper organizers, they knew the document remained an effective way of reminding clients to start getting organized well before April 15—and to keep the firm's brand top of mind.— Kyle Walters
2
: a region of a developing embryo or a substance produced by such a region that is capable of inducing a specific type of development in undifferentiated tissue
— called also inductor
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Merriam-Webster unabridged
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Time Traveler for organizer
The first known use of organizer was in 1786
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