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aluminium foil

(Australia, Britain, New Zealand) A very thin, pliable, easily torn sheet of aluminium used for cooking, packaging, cosmetics, and insulation.

əˈlumɪnəm ˈfɔɪlSilenthistorical135 viewsLast reviewed Jun 29, 2026+ Add a definition
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UK
#1·Apr 27, 2026UK

(Australia, Britain, New Zealand) A very thin, pliable, easily torn sheet of aluminium used for cooking, packaging, cosmetics, and insulation.

For parents

Aluminium foil means: A very thin, pliable, easily torn sheet of aluminium used for cooking, packaging, cosmetics, and insulation.. It is mainly Australian English and may not be understood outside that context. There is no real cause for parental concern; it is descriptive vocabulary rather than risky behaviour. This is a food-related word and harmless in itself. If your teen uses it, context will usually make the intent clear. A short, curious question about where they heard it is usually all that is needed to know whether to follow up.

For ESL learners

aluminium foil means: A very thin, pliable, easily torn sheet of aluminium used for cooking, packaging, cosmetics, and insulation.. Register: informal, Australian English. Often not understood outside its region; gloss the word on first use when writing for an international audience. Common learner mistake is using the word in a register it does not fit, or assuming a single global meaning; always check the context before producing it yourself.

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For specific readers

Aluminium foil means: A very thin, pliable, easily torn sheet of aluminium used for cooking, packaging, cosmetics, and insulation.. It is mainly Australian English and may not be understood outside that context. There is no real cause for parental concern; it is descriptive vocabulary rather than risky behaviour. This is a food-related word and harmless in itself. If your teen uses it, context will usually make the intent clear. A short, curious question about where they heard it is usually all that is needed to know whether to follow up.

Why is this section here?

Slang is read by different audiences for very different reasons. The For parents view re-explains the term in plain, non-judgemental language so a caregiver can understand what their child means without needing the surrounding subculture. The For English learners view focuses on register (when it's safe to use), formal alternatives, and common mistakes — what a textbook won't teach you.

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