a. Obs. Also 5 frustratoire, 67 frust(r)atorie, (6 frustatery, frustratarie, 78 frustatory). [ad. OF. frustratoire and late L. frustrātōrius, f. frustrārī to FRUSTRATE.] Tending to frustrate, balk, defeat, or make void. In early use also: Resulting in disappointment, disappointing.
1490. Caxton, Eneydos, xxii. 778. Many goynges & comynges were there made of the sayd anne from one parte to thother that fynably were all frustratoire.
1529. Act 21 Hen. VIII., c. 5. With convenyent spede without any frustratory delay.
1592. Conspir. Pretended Ref., 60. Then would he by frustratorie kindes of answeres goe about to put off such interrogatories.
1650. R. Gentilis, trans. Malvezzis Considerat., 144. If this be not true, that was frustratory, and of no availment to Socrates (who was the wisest amongst the Gentiles) which he beleeved to be a Demon, and in which he trusted, more than in his own prudency.
1681. Hickeringill, Vind. Naked Truth, II. 26. Without Frustatory Delay.
1726. Ayliffe, Parergon, 75. Bartolus restrains this to a Frustatory Appeal.