though

American Heritage® Dictionary of the English Language, Fourth Edition

1. conj. Despite the fact that; although: He still argues, though he knows he's wrong. Even though it was raining, she walked to work.
2. conj. Conceding or supposing that; even if: Though they may not succeed, they will still try. See Usage Note at although.
3. adv. However; nevertheless: Snow is not predicted; we can expect some rain, though.
4. adv. Informal Used as an intensive: Wouldn't that beat all, though?

Century Dictionary and Cyclopedia

1. Notwithstanding that; in spite of the fact that; albeit; while: followed by a clause, usually indicative, either completely or elliptically expressed, and noting a recognized fact.
2. Conceding or allowing that; however true it be that; even were it the case that; even if: followed by a subjunctive clause noting a mere possibility or supposition.
3. Hence, without concessive force, in the case that; if: commonly used in the expression as though.
4. Nevertheless; however; still; but: followed by a clause restricting or modifying preceding statements.
5. Synonyms Although, Though, etc. (See although.) While, Though. See while.
6. Notwithstanding this or that; however; for all that.

Wiktionary

1. adv. Despite that; however.
2. adv. Used to intensify statements or questions; indeed.
3. conj. Despite the fact that; although.
4. conj. If, that, even if.

GNU Webster's 1913

1. conj. Granting, admitting, or supposing that; notwithstanding that; if.
2. adv. However; nevertheless; notwithstanding; -- used in familiar language, and in the middle or at the end of a sentence.

WordNet 3.0

1. adv. (postpositive) however