PLANK Copy link • PLANK 1. s. assis or axis; tabula: to cut a tree into planks, arborem in laminas secare: oak planks, asses roboreae: to lay planks, coassare or coaxare: to floor with planks, assibus consternere, contabulare: a floor of planks, coassatio or coaxatio. 2. v. contabulare (Caes., Liv.); coassare or coaxare.