# sealing

/ˈsiɫɪŋ/ (US) · /sˈiːlɪŋ/ (UK)

Source: https://englishreference.com/word/sealing
Updated: 2026-08-08

## Senses

### 1. closing tightly

noun · CEFR B2

the act of closing something so tightly that nothing can get in or out.

For teachers: the process or action of making a container or space airtight, watertight, or secure against tampering.

- The sealing of the windows helped keep the house warm during the winter.
- Proper sealing of the laboratory samples is essential to prevent cross-contamination during the long-term storage phase.

### 2. hunting animals

noun · CEFR C1 · Technical

the activity of hunting seals, usually for their fur, skin, or oil.

For teachers: the commercial or subsistence hunting of seals.

- Many countries have passed laws to limit sealing in the Arctic.
- The decline of traditional sealing has had a significant economic impact on several remote coastal communities in the north.

### 3. closing or marking

verb · CEFR B1

the action of closing something firmly or marking it with an official stamp.

For teachers: the present participle of 'seal', used to describe the ongoing action of closing, fastening, or authenticating.

- He was sealing the envelopes when he realized he forgot to sign the letters.
- The notary was busy sealing the legal documents to ensure their authenticity before the court session began.

## Examples

- The sealing of the container prevents the food from spoiling.
- Proper sealing of the windows is essential for keeping the house warm during the winter months.
- The engineer inspected the vacuum chamber's sealing to ensure that no external atmospheric pressure could compromise the integrity of the delicate experiment inside.

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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.