A person who keeps records of financial transactions for a business; an accountant.
From Middle English 'book' and 'keeper,' literally someone who keeps the books (financial records). The abbreviation emerged in modern business shorthand.
Bookkeepers were essential before computers existed—they had to hand-write every transaction in massive ledgers, and a single mistake could throw off an entire company's finances. Their careful, meticulous work was literally the backbone of business.
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