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Definition of Portentously
1. Adverb. In a portentous manner. "Portentously, the engines began to roll"
Partainyms: Portentous
Definition of Portentously
1. Adverb. In an ominous manner. ¹
2. Adverb. In a pompous manner. ¹
¹ Source: wiktionary.com
Definition of Portentously
1. [adv]