Webster's Revised Unabridged Dictionary · 1913

Inanity

Inanity , noun

[Latin inanitas, from inanis empty: compare French inanité. See Inane.]

1.
Inanition; void space; vacuity; emptiness.
2.
Lack of seriousness; aimlessness; frivolity.
3.
An inane, useless thing or pursuit; a vanity; a silly object; -- chiefly in pl.; as, the inanities of the world.