Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A species of extinct humans known from fossil remains found in Africa and Eurasia and dating from about 1.9 million to less than 100,000 years ago. Homo erectus is widely regarded as an ancestor of Homo sapiens.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • proper noun a taxonomic species, within genus Homo - "Upright man" (extinct)

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun extinct species of primitive hominid with upright stature but small brain

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[New Latin Homō ērēctus, species name : Latin homō, man + Latin ērēctus, upright.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

From Latin homo ("man") + erectus ("erect, high")

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