# leaded

/ˈɫɛdɪd/ (US) · /lˈɛdɪd/ (UK) · CEFR B2 · Adjective

Source: https://englishreference.com/word/leaded
Updated: 2026-10-17

## Definition

containing lead, a soft grey metal that can be harmful to health. You see it in phrases like leaded petrol and leaded glass.

For teachers: containing or reinforced with lead, especially fuel treated with tetraethyl lead or glass held in lead strips. Common in historical contexts, as such uses are now largely phased out for health reasons.

## Examples

- This old house has leaded windows.
- The mechanic warns drivers that leaded petrol damages modern engines and is banned in many countries.
- The chapel preserves its original leaded panes, whose grey lattice softens the afternoon light while reminding visitors of building practices abandoned for health reasons.

## Antonyms

unleaded

## Pitfalls

- Not "he leaded the project" but "he led the project" — Led is the past tense of lead meaning to guide; leaded means containing lead.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.