alternation

alternation is a   Noun

Definition:

[1] The reciprocal succession of things in time or place; the act of following and being followed by turns; alternate succession, performance, or occurrence; as, the alternation of day and night, cold and heat, summer and winter, hope and fear.

[2] Permutation.

[3] The response of the congregation speaking alternately with the minister. Mason. Alternation of generation. See under Generation.

Synonyms: