Added 9 October 2026 jenner noun Categories: PeopleRare Words noun ! Definition from WordNet 3.1, Princeton University. More about jenner at Wordnik → Where our words come from → English physician who pioneered vaccination; Jenner inoculated people with small amounts of cowpox to prevent them from getting smallpox (1749-1823). Related Words: jenneyjennessjencksjumperjenrickjagerjennettejeffersjennensjeniferjahnerjernigan Back to today's word