References in classic literature ?
A certain indefinable apprehension still kept me in the saddle of the machine.
His head, with piercing eyes, a straight nose, a chim cut like that of Brutus, had altogether an indefinable character of grandeur and grace.
When he had perused the documents, an indefinable expression of pleasure lighted up his countenance, and looking at the major with a most peculiar smile, he said, in very excellent Tuscan, -- "Then there is no longer any such thing, in Italy as being condemned to the galleys?
A smile, which was indefinable, passed over the lips of the queen.
This latter quality is indefinable, and perhaps non-existent.
The crowd had withdrawn from the man, giving him sufficient room to roll over, in evident pain, while they yet stood gazing at him, with that indefinable feeling of curiosity and nerveless sympathy, which characterises man when not called on to act, by emulation, vanity, or the practice of well-doing.
Her sensations were indefinable, and so were they a few minutes afterwards upon hearing Henry Crawford, who had a chair between herself and Tom, ask the latter in an undervoice whether there were any plans for resuming the play after the present happy interruption (with a courteous glance at Sir Thomas), because, in that case, he should make a point of returning to Mansfield at any time required by the party: he was going away immediately, being to meet his uncle at Bath without delay; but if there were any prospect of a renewal of Lovers' Vows, he should hold himself positively engaged, he should break through every other claim, he should absolutely condition with his uncle for attending them whenever he might be wanted.
D'Artagnan pronounced these words with an indefinable tone of feigned bonhomie, for he knew very well that the victim of pirates was an old corsair, and had engaged him in consequence of that knowledge.
The man's dull face brightened as he perceived our hero, for Newman, for indefinable reasons, enjoyed the confidence of the liveried gentry.
Dona Rita and nothing more - unique and indefinable.
Almost every devout admirer of the old bards, if demanded his opinion of their productions, would mention vaguely, yet with perfect sincerity, a sense of dreamy, wild, indefinite, and he would perhaps say, indefinable delight; on being required to point out the source of this so shadowy pleasure, he would be apt to speak of the quaint in phraseology and in general handling.
Oh, to be able to say that one has lived--qu'on a vecu, as they say here--that idea exercises an indefinable attraction for me.