1
: acting or being against humanity
2
: reacting strongly with human antigens
antihuman antibodies

Word History

First Known Use

1738, in the meaning defined at sense 1

Time Traveler
The first known use of antihuman was in 1738

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Cite this Entry

“Antihuman.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/antihuman. Accessed 7 Jul. 2026.

Medical Definition

: reacting strongly with human antigens
antihuman antibodies
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