† bitume,v.Obs.rare. [f.bitume, obs. form of bitumen.] To smear or spread with bitumen. 1601Shakes.Per. iii. i. 72 We have a chest beneath the hatches, caulk'd and bitumed ready.Ibid. iii. ii. 56 How close 'tis caulk'd and bitumed [Other edd. bottomed].