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Containing three letters or characters, or three sets of letters or characters.

Three letters united in pronunciation so as to have but one sound, or to form but one syllable, as -ieu in adieu; a triphthong.

Consisting of three letters; trigrammic; as, a triliteral root or word. -- n.

m and the cardinal and four lords; at the which trist he and the cardinal agreed finally. Letter dated Sept., 1543.

on for labor to; -- used in polite phraseology; as, I will not trouble you to deliver the letter.

A raised letter, figure, accent, or other character, cast in metal or cut in wood, used in printing.

U, the twenty-first letter of the English alphabet, is a cursive form of the letter V, with which it was formerly used interchangeably, both letters being then used both as vowels and consonants. U and V are now, however, differentiated, U being used only as a vowel or semivowel, and V only as a consonant. The true pri…

Having the form of the letter U; specif. (Phys. Geog.),

Not answered; not replied; as, an unanswered letter.

Of, pertaining to, or designating, a certain style of letters used in ancient manuscripts, esp. in Greek and Latin manuscripts. The letters are somewhat rounded, and the upstrokes and downstrokes usually have a slight inclination. These letters were used as early as the 1st century b. c., and were seldom used after the…

To decipher; as, to uncipher a letter. [Obs.] Sir W. Temple.

To open; to separate the parts of; as, to unclose a letter; to unclose one's eyes.

Not dated; having no date; of unknown age; as, an undated letter.

To write one's name at the foot or end of, as a letter or any legal instrument. The undersigned, the person whose name is signed, or the persons whose names are signed, at the end of a document; the subscriber or subscribers.

Not addressed; not superscribed, as a letter.

Consisting of one letter only; as, a uniliteral word or sign.

ech.) (a) A joint formed by means of a union. (b) A piece of pipe made in the form of the letter T.

kely; improbable; unlikely. [Obsoles.] Unlike quantities (Math.), quantities expressed by letters which are different or of different powers, as a, b, c, a2, a3, xn, and the like. -- Unlike signs (Math.), the signs plus (+) and minus (-).

To break or remove the seal of; to open, as what is sealed; as, to unseal a letter. Unable to unseal his lips beyond the width of a quarter of an inch. Sir W. Scott.

The 20th letter (U, u) of the Greek alphabet, a vowel having originally the sound of oo as in room, becoming before the 4th century b. c. that French u or Ger. ü. Its equivalent in English is u or y.