fiat. 1  an authoritative decree, sanction, or order: a royal fiat. Synonyms: authorization, directive, ruling, mandate, diktat, ukase. 2  a fixed form of words containing the word fiat, by which a person in authority gives sanction, or authorization.
Definitions for heartiness. Here are all the possible meanings and translations of the word heartiness. Princeton's WordNet(0.00 / 0 votes)Rate this definition: vigor, vigour, dynamism, heartiness(noun) active strength of body or mind. heartiness, wholeheartedness(noun) the quality of hearty sincerity.
smoothness - powerful and effective language; his eloquence attracted a large congregation; fluency in spoken and written English is essential; his oily smoothness concealed his guilt from the police