verb (used with object), o·ver·pop·u·lat·ed, o·ver·pop·u·lat·ing.
- to fill with an excessive number of people, straining available resources and facilities: Expanding industry has overpopulated the western suburbs.
v.also overpopulate, “to overrun with too many people,” 1828 (implied in overpopulated), from over- + populate (v.). Related: Overpopulating. Over-populous “over-populated” is attested from 1670s.