Standard Lemma guide

nonresponder

noun · 2 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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1

noun

Meaning 1

A person who does not respond.

Definition source: English Wiktionary via Wiktextract

Examples

  • The court sent "requests to show cause" to all questionnaire non-responders.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

A person who does not show an immune response to a virus after being vaccinated against it; someone who does not react normally to a drug.

Definition source: English Wiktionary via Wiktextract

Topics: medicine, sciences

Examples

  • A vaccine non-responder is a person who does not develop protective surface antibodies after completing two full series of injections.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

Etymology tree English non- English respond Proto-Indo-European *-yósder. Proto-Italic *-āzios Latin -āriusnom. Latin -āriusbor. Proto-Germanic *-ārijaz Proto-West Germanic *-ārī Old English -ere Middle English -ere English -er English responder English nonresponder From non- + responder.