Infill

noun, verb

noun, verb ·Rare ·Advanced level

Definitions

Noun
  1. 1
    That which fills in a space, hole or gap. countable, uncountable

    "Government needs to provide certainty to the rail freight industry with infill electrification programmes [...]. "First, it's about Government committing to infill electrification so we can do things with the locomotives we already have, and then a rolling plan of electrification.""

  2. 2
    Alternative form of infil (“infiltration”). alt-of, alternative, countable, uncountable

    "Hinton and I were briefed at the TOC and received maps of our AO to memorize and mark with codes for the primary and secondary LZs for infill and exfill."

  3. 3
    The redecoration of a fingernail or toenail after it has grown, to prevent an unsightly gap. countable, uncountable
Verb
  1. 1
    To fill in a space, hole or gap.

    "Here the original drawing is shown in grey and the infilled tracing in black. The lettering can be further refined and, unlike ink-based artwork, can be rekerned without being redrawn."

  2. 2
    To rededicate land in an urban environment to new construction.

Antonyms

All antonyms
exfill

Example

More examples

"In urban planning, infill is the use of land within a built-up area for further construction."

Etymology

Etymology 1

From in + fill.

Etymology 2

Clipping.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.