verb

• (transitive) To change with time or a similar parameter.
  "He varies his magic tricks so as to minimize the possibility that any given audience member will see the same trick twice."
• (transitive) To institute a change in, from a current state; to modify.
  "You should vary your diet. Eating just bread will do you harm in the end."
• (intransitive) Not to remain constant: to change with time or a similar parameter.
  "His mood varies by the hour."
• (of the members of a group, intransitive) To display differences.
  "The sprouting tendency of potatoes varies between cultivars, years and places of growing."

noun

• (obsolete) alteration; change.
  "With euery gall, and varry of their Masters,"