Any alteration or change.
An alteration a particular sound of a word, especially the initial consonant, which is triggered by the word's morphological or syntactic context and not by its phonological context.
A group of thrushes.
A mutant.
Any heritable change of the base-pair sequence of genetic material.
A change, especially in one's life or fortunes.
Regular change or succession from one thing to another, or one part of a cycle to the next; alternation; mutual succession; interchange.