other

pron. something else, someone else

adv. otherwise, differently

adj. another; different; remaining of a pair; additional; in the recent past

n. remaining one of a pair; another one; different person

The Other or constitutive other (also referred to as othering) is a key concept in continental philosophy, opposed to the Same. It refers, or attempts to refer to, that which is other than the concept being considered. The term often means a person other than oneself, and is often capitalised.
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Adjective
1. not the same one or ones already mentioned or implied; "today isn't any other day"- the White Queen; "the construction of highways and other public works"; "he asked for other employment"; "any other person would tell the truth"; "his other books are still in storage"; "then we looked at the other house"; "hearing was good in his other ear"; "the other sex"; "she lived on the other side of the street from me"; "went in the other direction"
(antonym) same
(similar) another(a), different
(see-also) separate
(attribute) otherness, distinctness, separateness
2. further or added; "called for additional troops"; "need extra help"; "an extra pair of shoes"; "I have no other shoes"; "there are other possibilities"
(synonym) extra, other(a), additional
(similar) added
3. recently past; "the other evening"
(synonym) other(a)
(similar) past
4. of the distant past; "the early inhabitants of Europe"; "former generations"; "in other times"
(synonym) early(a), former(a), other(a)
(similar) past
5. very unusual; different in character or quality from the normal or expected; "a strange, other dimension...where his powers seemed to fail"- Lance Morrow
(similar) strange, unusual

(pron. & a.)
Not this, but the contrary; opposite; as, the other side of a river.
  

(pron. & a.)
Left, as opposed to right.
  

(pron. & a.)
Different from that which, or the one who, has been specified; not the same; not identical; additional; second of two.
  

(pron. & a.)
Alternate; second; -- used esp. in connection with every; as, every other day, that is, each alternate day, every second day.
  

(conj.)
Either; -- used with other or or for its correlative (as either . . . or are now used).
  

(adv.)
Otherwise.
  

The term "Other" with a capital "O" is used throughout the postmodern literature.  It means something quite different from the word "other" with a small "o".  Whereas the "other" is just someone else, each person has an "Other".  It is the inner voice that each of us hear evaluating us in our minds.  Our "Other" might say, "Job well done."  Or it might say, "You shouldn't have done that."  It is possible to argue with one's Other.  In fantasy one would simply explain to this imaginary voice why it is that one should do things as one did.  It is also possible to hear another real person "speaking with the voice of the Other."  This would mean that the other real person is saying (or one thinks she is saying) what the inner voice of the Other says.