The verb vary has 4 senses (first 4 from tagged texts)
1. (28) change, alter, vary -- (make or become different in some particular way, without permanently losing one's or its former characteristics or essence; "her mood changes in accordance with the weather"; "The supermarket's selection of vegetables varies according to the season")
2. (20) deviate, vary, diverge, depart -- (be at variance with; be out of line with)
3. (7) vary -- (be subject to change in accordance with a variable; "Prices vary"; "His moods vary depending on the weather")
4. (5) vary, variegate, motley -- (make something more diverse and varied; "Vary the menu")