Penetrate  v. (-ting) 1 a find access into or through. B (usu. Foll. By with) imbue with; permeate. 2 see into, find out, or discern. 3 see through (darkness, fog, etc.). 4 be absorbed by the mind. 5 (as penetrating adj.) A having or suggesting sensitivity or insight. B (of a voice etc.) Easily heard through or above other sounds; piercing.  penetrable adj. Penetrability n. Penetration n. Penetrative adj. [latin]