🇬🇧🇨🇳 vigilant - 警惕的 : English Lesson

Meaning of "vigilant" ("警惕的"), detailed definition, and a short video lesson below.

Vigilant means being very watchful and alert, like a careful guard. A vigilant person pays close attention to what is happening around them so they can notice any danger, trouble, or important change right away. It’s like keeping your eyes and mind wide open so you can stay safe and help others stay safe too.

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

Our vigilant smoke alarm screams every time I burn toast, which is almost every morning.

The vigilant lifeguard spotted my inflatable unicorn floating away before I did.

The vigilant librarian can sense noisy chewing from three shelves away.

Our vigilant principal can spot untucked shirts from the other end of the hallway.

My vigilant brain wakes me up at 3 a.m. just to say, “Did you lock the front door?”

On a cold night a mother stayed vigilant by the baby's room. She was vigilant when a faint smell of smoke rolled in. Vigilant, she lifted the baby, ran outside, and saw sparks on the roof. She knocked on neighbors' doors, vigilant until fire engines came. When firefighters left, she breathed, grateful and still vigilant.

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.