Looking for the meaning or definition of the word alternate? Here's what it means.
Adjective
Being or succeeding by turns; one following the other in succession of time or place; by turns first one and then the other; hence, reciprocal.
(mathematics) Designating the members in a series, which regularly intervene between the members of another series, as the odd or even numbers of the numerals; every other; every second.
(transitive, geometry) To perform an alternation (removal of alternate vertices) on (a polytope or tessellation); to remove vertices (from a face or edge) as part of an alternation.