🇬🇧🇨🇳 boundary - 边界 : English Lesson

Meaning of "boundary" ("边界"), detailed definition, and a short video lesson below.

A boundary is a real or imaginary line that marks the limits of an area or separates different areas. It can be physical, like a fence or a river, or conceptual, like the limits of acceptable behavior or personal space.

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

My pet turtle ignored the backyard boundary and is now living with the neighbors.

The boundary between “homework time” and “TV time” is very unfair.

The cat decided that the boundary of the litter box was optional.

The boundary between “playing nicely” and “wrestling” is about three seconds for my little brother.

The boundary between my side of the room and my brother’s side is made of dirty socks.

A boy chased a red ball to the garden boundary. He stopped at the old fence, fingers on the boundary wire, heart racing. The neighbor waved from the other boundary, smiling. The boy found the ball on the boundary line and pushed it back. Both laughed, keeping the boundary clear. The boy bowed and ran home, relieved.

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.