ppl. a. Obs. rare–1. [ad. L. adūnāt-us pa. pple. of adūnā-re to unite; f. ad to + ūnāre to make one, f. ūnus one.] United, joined in one.
1470. Harding, Chron., cxlvii. Two semely princes together adunate [v.r. adioynate].
