disjunction

noun5

1. •
   The act of disjoining; disunion, separation.
2. •
   The state of being disjoined, contrasting, or opposing.

   • the disjunction expressed by disjunctive conjunctions, such as but or or
3. •
   During meiosis, the separation of chromosomes (homologous in meiosis I, and sister chromatids in meiosis II).
4. •
   The proposition resulting from the combination of two or more propositions using the or operator.
5. •
   A logical operator that results in “true” when any of its operands are true.