What does "general staff" mean?

A group of officers in charge of an army under the control of the commander-in-chief.

General staff

noun

noun ·Rare ·Advanced level

Noun

1
A group of officers in charge of an army under the control of the commander-in-chief.
"Meronyms: staff officer, chief of staff"
2
military officers assigned to assist a senior officer in planning military policy wordnet

"Meronyms: staff officer, chief of staff"