Definition of Seal

to fasten something shut

Examples of Seal in a sentence

Once we seal the envelope closed, the letter is safe to put in the mailbox to be delivered to the recipient.  🔊

To keep her electricity bills to a minimum, Ms. Petroski opted to seal her windows in order to prevent air drafts from seeping into her home.  🔊

The homeowner would seal around the bathtub with caulk again since water had loosened the previous caulk.  🔊

Making sure the toxic chemicals would not escape into the air, the scientist would seal the chemical container tightly.  🔊

Flood waters poured into the house because the proprietor failed to seal the unusable door.  🔊

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