Definition of "headcount"

headcount

noun
plural headcounts
1. The act of counting how many people are present in a group.
  Quotations
  Population 39,693 (just north of 115,000 today), Cheltenham has been overtaken by Gloucester in terms of headcount.
  2023 January 11, Stephen Roberts, “Bradshaw's Britain: castles and cathedrals”, in RAIL, number 974, page 56
2. The number of people present in a group or employed by a company.
  Quotations
  The last headcount data for BTP is from December 2022, when the number of BTP officers was 3,183, up from 3,175 in April 2022.
  2023 March 8, “Network News: More than 200 BTP vacancies”, in RAIL, number 978, page 12
3. More generally, a consideration of a company's appropriate staffing level based on some larger context. (Generally used adjectivally.)
4. By extension, one slot in a workgroup, filled or to be filled by one person.