in keeping with; or in agreement/harmony/unity with
The Lovell Mingotts had sent out cards for what was known as "a formal dinner" (that is, three extra footmen, two dishes for each course, and a Roman punch in the middle), and had headed their invitations with the words "To meet the Countess Olenska," in accordance with the hospitable American fashion, which treats strangers as if they were royalties, or at least as their ambassadors.
The day, according to any current valuation, had been a rather ridiculous failure; he had not so much as touched Madame Olenska’s hand with his lips, or extracted one word from her that gave promise of farther opportunities.
After dinner, according to immemorial custom, Mrs. Archer and Janey trailed their long silk draperies up to the drawing-room, where, while the gentlemen smoked below stairs, they sat beside a Carcel lamp with an engraved globe, facing each other across a rosewood work-table with a green silk bag under it, and stitched at the two ends of a tapestry band of field-flowers destined to adorn an "occasional" chair in the drawing-room of young Mrs. Newland Archer.
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She will get a fair trial in accordance with the law.
She dresses in accordance with the latest fashions.
The long habit of living together in mutually dependent intimacy had given them the same vocabulary, and the same habit of beginning their phrases "Mother thinks" or "Janey thinks," according as one or the other wished to advance an opinion of her own; but in reality, while Mrs. Archer’s serene unimaginativeness rested easily in the accepted and familiar, Janey was subject to starts and aberrations of fancy welling up from springs of suppressed romance.
This was especially the case when the pleasure was a delicate one, as his pleasures mostly were; and on this occasion the moment he looked forward to was so rare and exquisite in quality that—well, if he had timed his arrival in accord with the prima donna’s stage-manager he could not have entered the Academy at a more significant moment than just as she was singing: "He loves me—he loves me not—HE LOVES ME!