🇬🇧🇪🇸 seal - sellar : English Lesson

Meaning of "seal" ("sellar"), detailed definition, and a short video lesson below.

To seal something means to close it up very tightly so that air, water, bugs, or anything else cannot get in or out. When you seal a box, a door, or a bag, you shut it and make it secure, often with tape, a zipper, a lid, or something sticky, so it stays closed until someone opens it on purpose.

Watch and listen to this English flashcard to understand the word in more detail, with an easy example sentence.

I sealed my math test in my folder, hoping my bad grade couldn’t escape and tell my parents.

Dad sealed the trash bag so well that even the smells had to file a complaint to get out.

The superhero sealed the giant hole in the spaceship with duct tape and a very confident smile.

I tried to seal my cookie jar, but my tummy kept breaking in for “emergencies.”

We sealed the cracks under the door, but somehow the smell of broccoli still invaded the house.

The storm comes. She must seal the door, the gaps, and the box that holds a wet fox cub. She did seal the lid, did seal the small cracks with tape, and seal the porch seam with cloth. Each seal calms the cub. Finally she seals the box tight and smiles.

This word is at the C1 level, which means it’s part of advanced English. It’s used in sophisticated conversations, professional settings, and academic discussions. Words at this level help you express yourself fluently and precisely in nuanced situations.

Expanding your English vocabulary is one of the best ways to improve your pronunciation, spelling, and confidence in English. Watch the video above to memorize the word, understand its meaning, and see example sentences in action. Discover related words to grow your vocabulary naturally. Add words to your playlist for stress-free, effective learning—anytime, anywhere! Watch, learn, repeat.