Meaning of the word covertly in English

What does covertly mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

covertly

US /koʊˈvɝːt.li/
UK /ˈkəʊ.vɜːt.li/

Adverb

secretly, or in a hidden way:

Example:
Terrorists have been operating covertly in America.