Shal·low a. [Compar. Shallower superl. Shallowest.]
 1. Not deep; having little depth; shoal. “Shallow brooks, and rivers wide.”
 2. Not deep in tone. [R.]
    The sound perfecter and not so shallow and jarring.   --Bacon.
 3. Not intellectually deep; not profound; not penetrating deeply; simple; not wise or knowing; ignorant; superficial; as, a shallow mind; shallow learning.
    The king was neither so shallow, nor so ill advertised, as not to perceive the intention of the French king.   --Bacon.
    Deep versed in books, and shallow in himself.   --Milton.