廣大之極，更無蓋之者也。與無上等同。又謂無所不蓋也。無量壽經上曰：「如來以無蓋大悲，矜哀三界。」同淨影疏曰：「佛悲殊勝，餘不能加，不能蓋上，名無蓋悲。」同嘉祥疏曰：「無蓋悲者，佛慈悲無所不覆蓋耳。」
That which cannot be covered or contained, universal; also that which includes all, a characteristic of the pity of Buddha, hence無蓋大悲, uncontainable, or superlative, pity.