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adj. flight·i·er, flight·i·est
a. Given to capricious or unstable behavior.
b. Characterized by irresponsible or silly behavior.
2. Easily excited; skittish.

flight′i·ly adv.
flight′i·ness n.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.flightiness - the trait of acting unpredictably and more from whim or caprice than from reason or judgment; "I despair at the flightiness and whimsicality of my memory"
irresponsibility, irresponsibleness - a form of untrustworthiness; the trait of lacking a sense of responsibility and not feeling accountable for your actions
References in classic literature ?
She could recognize her wild, desperate, defiant mood, the flightiness of her temper, and even some of the very cloud-shapes of gloom and despondency that had brooded in her heart.
"Makin' up to th' women folk just for vanity an' flightiness. There's nothin' he wouldn't do for th' sake o' showin' off an' flirtin' his tail-feathers.
The flightiness of his mirth rendered him often guilty of offences against the decorum of a Puritan household, and on these occasions he did not invariably escape rebuke.
As Shapira notes, Jews' "flirtations" with Jewishness "mirrored their experience of not wanting to--or their bitter acknowledgment that they would never--be fully accepted in Viennese society; their authorial creative license is symbolized in this posture of appearing in public halt turned away championing their Otherness." (10) All three studies underscore that the flightiness of Jewish visibility was actually its strength, as determining their level of visibility gave Jews a measure of power and control that they lacked in other contexts.
"Redeeming Relevance in the Book of Exodus: Explorations in Text and Meaning" was written by Rabbi Francis Nataf specifically for those who feel that there is nothing new to learn from reading the Book of Exodus again; that attempts at finding relevant meaning for today wallow in superficiality and flightiness. As he did with the Book of Genesis, veteran educator and Bible teacher Rabbi Francis Nataf shows us that careful and creative analysis of the text can still reap completely new and provocative insights geared to the intelligent modern reader.
After a childhood of radically changing interests and attitudes on such a timeline, one develops a certain excitability, flightiness, distractibility, or perhaps that's just me.
This isn't flightiness. The ability to radically alter one's perspective at any given moment is a vital component of living responsibly.
I long joked she wasn't allowed to take vacation because my flightiness would lose its anchor in her absence.
Henderson said her character's flightiness and innocence is fun to play with on stage.
Gabis flightiness and lack of coordination are sometimes overdone, making her seem like a scattered and shallow heroine, and her romance with Spencer is entirely predictable.
Books looking at the irrationality and flightiness of the monetary/financial world are plentiful.
Things change as Brooke's freespiritedness starts to resemble flightiness, her big dreams remain just that and nothing is worth doing unless she can share it on social media.