Entirely, completely, close up.
1601. The wind Septentrio that bloweth plumbe North.Hollands Pliny, p. 609. (N.E.D.)
1847. Im plumb out of bread.T. B. Thorpe, The Big Bear of Arkansas: Life and Manners in Arkansas, by an Ex-Governor, p. 157 (Phila.).
1850. His breeches split plum across with the strain, and the piece of wearin truck wots next the skin made a monstrous putty flag as the old hoss, like drunkards to a barbacue, streakt it up the road.H. C. Lewis (Madison Tensas), Odd Leaves, p. 51 (Phila.).
1851. Thar was one of the etarnalest whollopin bars cummin crack, crack, through the cane an kerslesh over the creek, and stopped right plumb slap up whar Ikes gun was.Polly Peablossoms Wedding, &c., p. 52.
1851. [He] looked me right plum in the face as savage as er meet axe!Id., p. 149.
1858. He wur plum crazy, an jumped over the frunt ov the pulpit.Olympia Pioneer, Feb. 26.
1859. We re plum out of every thing to eat in the house.Knick. Mag., liii. 316 (March).
1860. [Mr. Lincolns house at Springfield, Ill.] is built plumb out to the sidewalk.N.Y. Herald, Aug. 13.
1860. I took the wrong trail, and rode plump up to a band of hostiles at We-tum-kee; but they were so absorbed in a war-dance I got off without being discovered.J. F. H. Claiborne, Life of Gen. Sam. Dale, p. 67 (N.Y.).
1865. We kin come up with him yit, ef we turn plumb round, and foller on tother road,whar we lost the trail,back thar, three miles ter the deadnin.Edmund Kirke, John Jordan, Atlantic Monthly, xvi. 441/1 (Oct.).
1893. Youre plumb crazy, she remarked with easy candor. By the time you got a teethin baby of your own you wont hev time to see ghosts.Harpers Weekly, p. 1211/3 (Dec. 16). (N.E.D.)