🇬🇧 Opacity meaning: English Vocabulary Flash Card

Opacity is how hard or impossible it is to see through something. If something has high opacity, like a brick wall or a thick fog, you can’t see through it at all. If it has low opacity, like clean glass or clear water, you can see right through. Artists, designers, and computer programs also use “opacity” to describe how see‑through colors and pictures are—100% opacity means not see‑through, and 0% opacity means completely invisible.

My little brother tested the opacity of his milk by peeking through it and spilling it all over his face.

Due to the extreme opacity of the mud puddle, I only discovered its depth when I vanished into it up to my knees.

The ghost wore a sheet with very low opacity, so instead of scary, it just looked like a confused curtain.

The opacity of the shower steam turned Dad into a singing cloud with legs.

The invisibility potion had zero opacity, which was fine until we lost the bottle forever on the kitchen counter.

Cold breath fogged the café window; she traced a circle to test opacity. The opacity of the steam hid a dog outside. As rain thickened, dirt raised the window's opacity again. A barista wiped away the opacity with a cloth. Sun slipped through the clear glass, and she smiled at the simple change in opacity.

This word is at the C2 level, which means it represents the highest mastery of English. It’s often used in specialized or highly formal contexts and helps you communicate with precision and subtlety, much like a native speaker.

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.