Standard Lemma guide

backfill

noun · verb · 9 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

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • /ˈbækfɪl/
  • US: Recorded audio is listed in the source snapshot.

1

noun

Meaning 1

The material that has been used to refill an excavation.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

Reserve support personnel.

Definition source: English Wiktionary via Wiktextract

Usage: US, countable, uncountable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

That which backfills; a replacement.

Definition source: English Wiktionary via Wiktextract

Usage: US, countable, uncountable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

noun

Meaning 4

Material in a story set earlier in the past, providing history or context for the current action.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

Topics: literature, media, publishing

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

5

verb

Meaning 5

To refill a hole with the material dug out of it.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

6

verb

Meaning 6

To refill an excavation unit to restore the former ground surface and/or to preserve the unit and make it recognizable as having been excavated.

Definition source: English Wiktionary via Wiktextract

Topics: archaeology, history, human-sciences, sciences

Examples

  • We backfilled the cistern with pea gravel to discourage its use as a refuse container.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

7

verb

Meaning 7

To provide reserve support.

Definition source: English Wiktionary via Wiktextract

Usage: US

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

8

verb

Meaning 8

To replenish or restock due to attrition or loss.

Definition source: English Wiktionary via Wiktextract

Usage: US

Examples

  • The company backfilled Joe's position after he was terminated.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

9

verb

Meaning 9

To enter an online game that's already in progress, replacing a player who left early.

Definition source: English Wiktionary via Wiktextract

Topics: games, gaming

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

Etymology tree Proto-Indo-European *bheg-der.? Proto-Germanic *baką Proto-West Germanic *bak Old English bæc Middle English bak English back English fill English backfill From back + fill.

Across languages

Translations

1 source translations are retained for this English entry.

  • Spanish: atibar — Translations