Definitions
1.NounThat which is vain, futile, or worthless; that which is of no value, use or profit.
2.NounExcessive pride in or admiration of one's own abilities, appearance, achievements, or possessions.
3.NounA dressing table used to apply makeup, preen, and coif hair, in which the table is normally quite low and similar to a desk.
4.NounA washbasin installed into a permanently fixed storage unit, used as an item of bathroom furniture.
5.NounAny idea, theory or statement that is without foundation."It is a vanity to say that if two stones are dropped from a tower, the heavier will experience the greater acceleration."