/ɪnˈfɪltreɪt/ iN-fil-trayt

Definitions

1. verb

to enter or become a part of a group or organization secretly

“The spy was able to infiltrate the company and gather sensitive information.”

2. verb

to spread or gain control of something gradually and often in a subtle way

“The new idea began to infiltrate the popular culture, influencing art and music.”

3. noun

an act or instance of entering or becoming a part of a group or organization secretly

“The infiltration of the company was discovered by the security team.”

4. noun

a person who enters or becomes a part of a group or organization secretly

“The infiltrator was working undercover to gather intelligence on the enemy’s plans.”