HOME > LOOK UP & LEARN

V2 Vocabulary Building Dictionary



infectious

adjective

Definition: able to infect, in terms of spreading a disease or spreading or affecting an emotion or feeling

Synonyms: contagious, toxic, virulent, catching

Antonyms: contained, salutary, healthy

Tips: Although infectious is usually a negative word to describe something that can infect you with a disease, virus, or bacteria, infectious is often used to describe infectious emotion or energy: "His energy is infectious and everyone who encounters him absorbs his energy." Another common usage is that of "an infectious smile." This means that the person's friendly, beaming smile easily spreads to others.

Usage Examples:

Great motivational speakers like Tony Robbins have infectious energy. (contagious, easily spread)

Richie is a lot of fun to go out with, and his positive vibe is infectious. (contagious, easily spread)

I wouldn't go into his office, because I heard he's sick and apparently highly infectious. (contagious)

The energy and excitement at the concert were infectious. (contagious, catching)


Want to Learn More Words Like infectious?
Discover How You Can Improve Your
Vocabulary 10 to 100 Times Faster with
the Power Vocabulary Builder

Dear Friend,

The definition and lessons for the word infectious were made available by the Power Vocabulary Builder.

The Power Vocabulary Builder will help you develop a fuller, richer vocabulary 10 to 100 times faster than any other program available.

Visit the the Power Vocabulary Builder site right now to discover how you can get full access to this breakthrough program today!

What's your vocabulary level?
Power Vocabulary Builder
FREE E-mail Course!

Drop your details in the boxes below to receive a FREE vocabulary course: