Definitions

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

  • adj. Of a lower order than humans; subhuman.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A creature that is not (yet) at the level of understanding of a human being, such as a presymbolic child or an animal.

from The Century Dictionary and Cyclopedia

  • Having attributes or qualities lower than the human in the scale of being: the opposite of superhuman.

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

  • adj. belonging to a group below humans in evolutionary development

Etymologies

infra- +‎ human (Wiktionary)

Examples

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