Standard Lemma guide

underpart

noun · verb · 4 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 lower or underneath part.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

A lower or underneath part.

Such a part of a bird.

Definition source: English Wiktionary via Wiktextract

Usage: plural, usually

Topics: biology, natural-sciences, ornithology

Examples

  • buffy underparts
  • This bird species has tan underparts. Try to catch a glimpse when the bird takes off.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

verb

Meaning 3

To divide (a part) and assign subordinate portions of it.

Definition source: English Wiktionary via Wiktextract

Usage: transitive

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

noun

Meaning 4

a part lying on the lower side or underneath an animal's body

Definition source: Princeton WordNet 3.0

Examples

  • the warbler has a white throat and underparts
  • a woodland mouse with white underparts

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: body part

Narrower terms: belly

History

Etymology

Etymology tree Proto-Indo-European *h1én Proto-Indo-European *h1entér Proto-Indo-European *(H)n̥dhí Proto-Indo-European *-ér Proto-Indo-European *(H)n̥dhér Proto-Germanic *under Proto-West Germanic *undar Old English under- Middle English under- English under- English part English underpart From under- + part.