'Propitiousness' definitions:

Definition of 'propitiousness'

noun

The favorable quality of strongly indicating a successful result [syn: auspiciousness, propitiousness] [ant: inauspiciousness, unpropitiousness]

From: GCIDE

Propitious \Pro*pi"tious\, a. [L. propitius, perhaps originally a term of augury meaning, flying forward (pro) or well; cf. Skr. pat to fly, E. petition, feather.] [1913 Webster]
1. Convenient; auspicious; favorable; kind; as, a propitious season; a propitious breeze. [1913 Webster]
2. Hence, kind; gracious; merciful; helpful; -- said of a person or a divinity. --Milton. [1913 Webster]
And now t' assuage the force of this new flame, And make thee [Love] more propitious in my need. --Spenser. [1913 Webster]
Syn: Auspicious; favorable; kind.
Usage: Propitious, Auspicious. Auspicious (from the ancient idea of auspices, or omens) denotes "indicative of success," or "favored by incidental occurrences;" as, an auspicious opening; an auspicious event. Propitious denotes that which efficaciously protect us in some undertaking, speeds our exertions, and decides our success; as, propitious gales; propitious influences. [1913 Webster] -- {Pro*pi"tious*ly}, adv. -- {Pro*pi"tious*ness}, n. [1913 Webster]