adv. 1. To that or this. Chaucer. [ 1913 Webster ]
2. Besides; moreover. [ Obs. ] Spenser. [ 1913 Webster ]
Her mouth full small, and thereto soft and red. Chaucer. [ 1913 Webster ]
adv. Up to that time; before then; -- correlative with heretofore. [ 1913 Webster ]