FRUS'TRATE, verb transitive [Latin frustro.]
1. Literally, to break or interrupt; hence, to defeat; to disappoint; to balk; to bring to nothing; as, to frustrate a plan, design or attempt; to frustrate the will or purpose.
2. To disappoint; applied to persons.
3. To make null; to nullify; to render of no effect; as, to frustrate a conveyance or deed.
FRUS'TRATE, part. adjective Vain; ineffectual; useless; unprofitable; null; void; of no effect.