Th

from The American Heritage® Dictionary of the English Language, 5th Edition.

• abbreviation Bible Thessalonians
• abbreviation Thursday

from The Century Dictionary.

• noun A suffix (-eth after a vowel) used in forming ordinal from cardinal numerals, as in fourth, fifth, sixth, etc., twentieth, thirtieth, hundredth, thousandth, millionth, etc.
• noun A suffix (in older form -eth) used in forming the third person singular (and in Middle English all persons plural) of the present indicative of verbs, as in singeth, hopeth, etc., or hath, doth, etc.
• noun A suffix used in forming abstract nouns from adjectives or verbs, as in health from whole or heal, stealth from steal, filth from foul, tilth from till, growth from grow, truth, troth, from true or trow, drouth from dry, highth from high, etc.
• noun An abbreviation of Thursday.
• noun In chem., the symbol for thorium.
• noun In chem.: a symbol for thallium: better Tl.
• noun A common English digraph. See T.

from the GNU version of the Collaborative International Dictionary of English.

• In Old English, the article the, when the following word began with a vowel, was often written with elision as if a part of the word. Thus in Chaucer, the forms thabsence, tharray, thegle, thend, thingot, etc., are found for the absence, the array, the eagle, the end, etc.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun chemistry Symbol for thorium.
• noun Country code for Thailand.
• noun Abbreviation of Thursday.
• proper noun Abbreviation of Thessalonians.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun the fifth day of the week; the fourth working day
• noun a soft silvery-white tetravalent radioactive metallic element; isotope 232 is used as a power source in nuclear reactors; occurs in thorite and in monazite sands