Meaning of the word "second in command" in English

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

second in command

US /ˈsɛkənd ɪn kəˈmænd/
UK /ˈsɛkənd ɪn kəˈmɑːnd/

Noun

the person next in authority to the leader of a group or organization

Example:
As the second in command, she was responsible for overseeing daily operations.
He was appointed as the general's second in command.