Webster's Revised Unabridged Dictionary · 1913

Sirdar

Sirdar , noun

[Hind. & Per. sardār a chief, general; sar the head, top + dār holding, possessing.]

A native chief in Hindostan; a headman. — Malcom
2.
In Turkey, Egypt, etc., a commander in chief, esp. the one commanding the Anglo-Egyptian army.