• Webster's Revised Unabridged Dictionary
    • v. i Perpend To attend; to be attentive.
    • v. t Perpend To weight carefully in the mind. "Perpend my words."
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Century Dictionary and Cyclopedia
    • perpend To weigh in the mind; consider attentively.
    • perpend To hang down.
    • n perpend In architecture, a long stone reaching through the thickness of a wall so that it is visible on both sides, and is therefore wrought and smoothed at both ends. Now usually called bond-stone, bonder, or through, also perpend-stone, perpent-stone. See cut under ashler.
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Chambers's Twentieth Century Dictionary
    • v.t Perpend per-pend′ to weigh in the mind, to consider carefully.
    • n Perpend per′pend in building, a bond-stone or bonder
    • Perpend Also Per′pend-stone, Per′pent-stone
    • ***


Webster's Revised Unabridged Dictionary
L. perpendere, perpensum,; per + pendere, to weight


In literature:

Care must be taken to keep the "perpends," or vertical joints, one immediately over the other.
"Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3" by Various
The hired retainer perpended.
"Love Among the Chickens" by P. G. Wodehouse
Perpend, sir, all the bearings of the case.
"The Book of Humorous Verse" by Various
Wherefore, most selected friend, perpend at thy leisure, and so God speed thee!
"The Letters of Charles Dickens" by Charles Dickens
I do perpend that to earn these pieces of which you speak one must perform some worthy business.
"Robin Hood" by Paul Creswick
He watched her shining eyes perpending, saw the gleam of anticipated delight.
"Love and Lucy" by Maurice Henry Hewlett
Perpending which problem, the philosopher fell deliciously asleep.
"Dreamers of the Ghetto" by I. Zangwill
Would it not, as Henley used to say, give him much to perpend?
"An Ocean Tramp" by William McFee
The Herr Over-Superintendent, a bulky official, came up beside me and perpended visibly.
"Miss Cayley's Adventures" by Grant Allen
If he meets with only conscripts and militia he may penetrate as far as Harrisburg, and then let Europe perpend!
"A Rebel War Clerk's Diary at the Confederate States Capital" by John Beauchamp Jones

In science:

If the radio peak (N1) represents the termination point of the jet, the detection of this filament of IR emission perpend icular to the hot spot/jet axis suggests that there is particle acceleration (and therefore large velocities) perpendicular to this axis as well.
A Radio through X-ray Study of the Hot Spots, Active Nucleus, and Environment of the Nearby FR II Radio Galaxy 3C 33
In the first row patterns are viewed perpendic ular to the orbital plane, while in the second row patterns are viewed along the orbital plane.
Envelope density pattern around wide binary AGB stars: a dynamical model