n.
Pronunciation: ə r, ' o ̇ r, Southern also ' är
Function: conjunction
Etymology: Middle English, alteration of other, alteration of Old English oththe; akin to Old High German eddo or
Date: 13th century
1 ― used as a function word to indicate an alternative <coffee or tea> <sink or swim>, the equivalent or substitutive character of two words or phrases <lessen or abate>, or approximation or uncertainty <in five or six days>
2 archaic : EITHER
3 archaic : WHETHER
4 ― used in logic as a sentential connective that forms a complex sentence which is true when at least one of its constituent sentences is true ― compare DISJUNCTION