One of the fourteen ratnas (precious and unique animate and inanimate objects) of the Cakravarti (universal sovereign);
divine umbrella which protects the army of the Cakravarti from heat, wind and rain.
chatraṃ......tapanātapavātavṛṣṭiprabhṛtidoṣakṣayakārakam.
(Prasā 1214 Vṛ Pa 350)