·adj Vain; ineffectual; useless; unprofitable; null; voil; nugatory; of no effect.
II. Frustrate ·vt To make null; to Nullifly; to render invalid or of no effect; as, to frustrate a conveyance or deed.
III. Frustrate ·vt To bring to nothing; to prevent from attaining a purpose; to Disappoint; to Defeat; to Baffle; as, to frustrate a plan, design, or attempt; to frustrate the will or purpose.