/ɪnˈfɛktɪəs/ iN-fek-ti-əs

Definitions

1. adjective

causing or tending to cause disease, or being capable of spreading to other people or organisms

“The infectious diseases spread quickly throughout the city.”

2. noun

a catchy tune or phrase that spreads from person to person

“The infectious melody stuck in her head all day.”

3. noun

a quality that is highly appealing or attractive

“Her infectious enthusiasm inspired everyone to participate.”