13. Self'-POS-sessed, undisturbed, calm in mind, manner, etc.
"McGuffey's Fifth Eclectic Reader"
William Holmes McGuffey
And indeed, Miss Garnet may have had her suspicions, for over their ice-cream and coffee she said amusedly to Mrs. Fair, and evidently in reference to him, "I am afraid it was only the slightness of our acquaintance that kept him from being POS-i-tive-ly pet-u-lent."
"John March, Southerner"
George W. Cable
I know perfectly well you don't expect ever to mean anything to anybody any more; you consider it a sheer im-POS-si-bil-i-ty.
"John March, Southerner"
George W. Cable