Meaning

noun a pair of loose trousers tied by a drawstring around the waist; worn by men and women in some Asian countries

noun (usually plural) loose-fitting nightclothes worn for sleeping or lounging; have a jacket top and trousers

originBorrowed from Hindustani (Hindi पाजामा (pājāmā) / Urdu پاجامہ (pājāma)), from Classical Persian پَاجَامَه (pājāma, “trousers, drawers”), from پَا (pā, “leg”) + جَامَه (jāma, “garment”).

Etymology from Wiktionary, CC BY-SA 3.0