http://dictionary.reference/browse/one/?s=t

World English Dictionary
one  (wʌn)

— determiner
1. a. single; lone; not two or more: one car
  b. ( as pronoun ): one is enough for now ; one at a time
  c. ( in combination ): one-eyed ; one-legged
2. a. distinct from all others; only; unique: one girl in a million
  b. ( as pronoun ): one of a kind
3. a. a specified (person, item, etc) as distinct from another or others of its kind: raise one hand and then the other
  b. ( as pronoun ): which one is correct?
4. a certain, indefinite, or unspecified (time); some: one day you'll be sorry
5. informal a an emphatic word for an : it was one hell of a fight
6. a certain (person): one Miss Jones was named
7. in one , all in one  combined; united
8. all one
  a. all the same
  b. of no consequence: it's all one to me
9. ( often foll by  with ) at one  in a state of agreement or harmony
10. be made one  (of a man and a woman) to become married
11. many a one  many people
12. neither one thing nor the other  indefinite, undecided, or mixed
13. never a one  none
14. one and all  everyone, without exception
15. one by one  one at a time; individually
16. one or two  a few
17. one way and another  on balance
18. informal off on one  exhibiting bad temper; ranting
19. one with another  on average

— pron
20. an indefinite person regarded as typical of every person: one can't say any more than that
21. any indefinite person: used as the subject of a sentence to form an alternative grammatical construction to that of the passive voice: one can catch fine trout in this stream
22. archaic  an unspecified person: one came to him

— n
23. See also number the smallest whole number and the first cardinal number; unity
24. a numeral (1, I, i, etc) representing this number
25. informal  a joke or story (esp in the one about )
26. music  the numeral 1 used as the lower figure in a time signature to indicate that the beat is measured in semibreves
27. something representing, represented by, or consisting of one unit
28. Also called: one o'clock  one hour after noon or midnight
29. a blow or setback (esp in the phrase one in the eye for )
30. the one  (in Neo-Platonic philosophy) the ultimate being
31. the Holy One , the One above  God
32. the Evil One  Satan; the devil