The outer boundary or periphery of a surface
सतह की बाहरी सीमा या परिधि
English Usage: The envelope of surface of the balloon expanded as it was inflated.
Hindi Usage: गुब्बारे को फुलाते समय उसकी सतह का घेरा बढ़ता गया।
sath ka ghera, satah ka ghera, sathe ka ghera, satha ka ghera
