from The American Heritage® Dictionary of the English Language, 4th Edition
- conj. Used after a comparative adjective or adverb to introduce the second element or clause of an unequal comparison: She is a better athlete than I.
- conj. Used to introduce the second element after certain words indicating difference: He draws quite differently than she does.
- conj. When. Used especially after hardly and scarcely: I had scarcely walked in the door than the commotion started.
- prep. Usage Problem In comparison or contrast with: could run faster than him; outclassed everyone other than her.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- conj. (usually used with for) Because; for.
- conj. Used in comparisons, to introduce the basis of comparison.
- prep. introduces a comparison, and is associated with comparatives, and with words such as more, less, and fewer. Typically, it seeks to measure the force of an adjective or similar description between two predicates.
- adv. At that time; then.
from the GNU version of the Collaborative International Dictionary of English
- conj. A particle expressing comparison, used after certain adjectives and adverbs which express comparison or diversity, as more, better, other, otherwise, and the like. It is usually followed by the object compared in the nominative case. Sometimes, however, the object compared is placed in the objective case, and than is then considered by some grammarians as a preposition. Sometimes the object is expressed in a sentence, usually introduced by that.
- adv. Then. See then.
from The Century Dictionary and Cyclopedia
- At that time; then. See then.
- A particle used after comparatives, and certain words which express comparison or diversity, such as more, better, other, otherwise, rather, else, etc., and introducing the second member of a comparison.
- Sometimes the preceding comparative is left to be inferred from the context; sometimes it is omitted from mere carelessness. A noun or a pronoun after than has a show of analogy with one governed by a preposition, and is sometimes blunderingly put in the objective case even when properly of subjective value: as, none knew better than him. Even Milton says than whom, and this is more usual: for example, than whom there is none better.
Middle English, from Old English thanne, than.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Middle English than, thanne, from Old English þanne, a variant of þonne ("then, since, because"), from Proto-Germanic *þana (“at that, at that time, then”). Cognate with Dutch dan ("than"), German denn ("than"), German dann ("then"). More at then. (Wiktionary)