Utas \U"tas\, n. [OF. huitieves, witieves, witaves, oitieves, pl. of huitieve, witieve, etc., eighth, L. octavus. See Octave, n.]

[Written also utis.]

1. (O. Eng. Law) The eighth day after any term or feast; the octave; as, the utas of St. Michael. --Cowell.

The marriage was celebrated and Canterbury, and in the utas of St. Hilary next ensuing she was crowned. --Holinshed.

2. Hence, festivity; merriment. [Obs.]

--Shak.

Source: Webster's Revised Unabridged Dictionary (1913)