spec. Of an observance or ceremony: That may equally well be done or not done, observed or neglected, etc.; non-essential.

esp. in phrase of indifferency, that is indifferent, unessential, immaterial, unimportant.

(un-, prefix1 affix 1.)

That can be dispensed with or done without; unessential, omissible; unimportant.

Of the nature of waste matter or recrement; drossy; superfluous. Cf. recremental, adj.

Of no consequence; unimportant, insignificant. Chiefly in predicative use. Cf. earlier immaterially, adv. 2.

= recremental, adj.

absol. That which is not essential.