English Reference
noun · verb

smudge

n. · v.
US /ˈsmədʒ/ UK /smˈʌdʒ/ smudge UK spelling smudges

  1. 01 B2 Upper Intermediate

    n.a dirty mark or spot on a surface, often made by rubbing it with your finger.

    n.a blurred or smeared blemish on a surface, typically caused by accidental rubbing or contact with a soiling agent.

    Simple

    There was a dark smudge of ink on his cheek after he finished writing.

    In context

    The forensic team identified a faint smudge of grease on the door handle, which suggested the intruder had been wearing work gloves.

  2. 02 B2 Upper Intermediate

    v.to make a mark messy or blurry by rubbing it.

    v.to obscure or blur a mark, drawing, or text by rubbing it; often used for wet ink or charcoal.

    Simple

    Be careful not to smudge the ink before it is completely dry.

    In context

    The artist used his thumb to smudge the charcoal lines, creating a softer shadow effect along the jawline of the portrait.

  3. 03 B2 Upper Intermediate

    v.to make something dirty by getting marks on it.

    v.to soil or stain a surface with a dirty substance.

    Simple

    The children managed to smudge their clean white shirts with mud.

    In context

    Exhaust fumes from the heavy traffic had begun to smudge the white marble of the historic monument.

  4. 04 C1 Advanced Technical Religion

    v.to burn dried herbs, like sage, to clean a room or person spiritually with smoke.

    v.to perform a ritual cleansing of a space or person by burning dried herbs, typically sage, and spreading the smoke.

    Simple

    She decided to smudge the new house to clear out any negative energy.

    In context

    The practitioner began to smudge the room with white sage, following a tradition intended to purify the atmosphere before the ceremony.

    Usage

    Often used as an intransitive verb or with a direct object representing the space being cleansed.

    purifyfumigate
  5. 05 C2 Proficiency TechnicalAmerican English

    n.a smoky fire used to keep insects away or to protect plants from cold weather.

    n.a fire made of damp materials to produce dense smoke, used to repel insects or protect orchards from frost.

    Simple

    The farmer lit a smudge in the field to keep the mosquitoes away from the cattle.

    In context

    During the unexpected cold snap, the citrus growers maintained a constant smudge to prevent the frost from settling on the delicate blossoms.

    smudge potsmoke screen

On climate maps, it appears as a strange blue smudge in a sea of red - the so-called cold blob.

BBC News· 14 Jul 2026

Etymology 1

Derived from the verb (see below). Doublet of smutch.

Etymology 2

From Middle English *smogen (attested in the gerund smogynge (“soiling, smudging”)), of obscure origin. Compare Middle English besmudded, bismuddet (“filthy”), Middle English smod (“filth, obscene behaviour”), Middle Dutch smoddich (“filthy, dirty”), German schmutzig (“dirty, filthy”).

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Level B2 · Upper Intermediate
Frequency Occasional
Updated