Shallow, a. [Compar. Shallower; superl. Shallowest.]
Etymology: [OE. schalowe, probably originally, sloping or shelving; cf. Icel. skjalgr wry, squinting, AS. sceolh, D. & G. scheel, OHG. schelah. Cf. Shelve to slope, Shoal shallow.]
1. Not deep; having little depth; shoal. "Shallow brooks, and rivers wide." Milton.
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.
3 other Webster entries under this spelling
Shallow, n.
1. A place in a body of water where the water is not deep; a shoal; a flat; a shelf. A swift stream is not heard in the channel, but upon shallows of gravel. Bacon. Dashed on the shallows of the moving sand. Dryden.
2. (Zoöl.)
The rudd. [Prov. Eng.]
Shallow, v. t.
To make shallow. Sir T. Browne.
Shallow, v. i.
To become shallow, as water.