1. The geological epoch that lasted from approximately 2.6 million to 11,700 years ago, characterized by repeated glacial cycles and the evolution of early humans.
Usage: geological/scientific term; capitalized when referring to the epoch

1. Of, relating to, or belonging to the Pleistocene epoch.
Usage: geological/scientific term; typically capitalized

Examples

• The Pleistocene epoch saw the emergence of modern humans.
• Pleistocene fossils have provided scientists with crucial evidence about early human migration.
• Woolly mammoths roamed the Earth during the Pleistocene.
• Geologists study Pleistocene ice cores to understand past climate patterns.
• The end of the Pleistocene marked the beginning of the Holocene epoch.
• Many large animals went extinct at the close of the Pleistocene.