1. (conj.)than (used after comparative adjectives and adverbs and certain other words, such as other, otherwise, else, etc., to introduce the second member of a comparison): She's taller than I am.
2. than (used after some adverbs and adjectives expressing choice or diversity, such as other, otherwise, else, anywhere, different, etc., to introduce an alternative or denote a difference in kind, place, style, identity, etc.): I had no choice other than that.
3. than when: We barely arrived than it was time to leave.
4. (prep.)than in relation to; by comparison with: He is taller than his father.
Etymology: (bef. 900; ME, OE than(ne) than, then, when, orig. var. of thonnethen)
1. (preposition)than indicates a comparison I'm much shorter than my sister.; It takes more than twenty minutes to walk there.; I speak better Spanish than you (do).
Definition of 'than'
Webster Dictionary
1. (adverb)than then. See Then
2. than 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; as, I would rather suffer than that you should want
Definitions of than 
Afrikaans: as
Arabic: أكْثَر مِن
Bulgarian: отколкото
Brazilian: do que
Czech: než
German: als
Danish: end
Greek: από, παρά, σε σύγκριση με
Spanish: que; de lo que
Estonian: kui
Farsi: از
Finnish: kuin
French: que
Hebrew: מֵאֲשֶר-
Hindi: से
Croatian: nego, negoli
Hungarian: mint
Indonesian: daripada
Icelandic: heldur en, en
Italian: che; di
Japanese: ～より
Korean: (~)보다
Lithuanian: nei, negu
Latvian: nekā; par
Malay: daripada
Dutch: dan
Norwegian: enn
Polish: niż, aniżeli
Portuguese: do que
Romanian: decât
Russian: чем
Slovak: ako
Slovenian: kot
Serbian: od
Swedish: än
Thai: กว่า (ใช้ในการเปรียบเทียบ
Turkish: ...-den/dan
Taiwanese: 比
Ukrainian: ніж, від
Urdu: تقابل کے ليے استعمال ہونے
Vietnamese: hơn
Chinese: 比
