Obs.–1 [ad. med.L. *ūsātiōn-, ūsātio, noun of action f. ūsāre to USE. Cf. Sp. usacion.] Customary action; established usage.
1556. J. Heywood, Spider & Fly, xxxvii. 25. If … the flies do here pike That quarell to spiders, in customes vsacion. That is tit for tat.
