other

Concise Oxford English Dictionary © 2008 Oxford University Press:
other/ˈʌðə(r)/

▶adjective & pronoun

• 1 used to refer to a person or thing that is different from one already mentioned or known.

  ■ alternative of two.

  ■ those not already mentioned.

• 2 additional.

• 3 (the other) Brit. informal sexual intercourse.

• 4 (usu. the Other) Philosophy & Sociology that which is distinct from, different from, or opposite to something or oneself.

– phrases
no other archaic nothing else.
the other day (or night, week, etc.) a few days (or nights, weeks, etc.) ago.
one's other half Brit. informal one's wife, husband, or partner.
the other place Brit. humorous

• 1 hell, as opposed to heaven.

• 2 Oxford University as regarded by Cambridge, and vice versa.

• 3 the House of Lords as regarded by the House of Commons, and vice versa.

the other woman the mistress of a married man.

– origin OE ōther, of Gmc origin.