1. (superl.) Not deep; having little depth; shoal.

2. (superl.) Not deep in tone.

3. (superl.) Not intellectually deep; not profound; not penetrating deeply; simple; not wise or knowing; ignorant; superficial; as, a shallow mind; shallow learning.

4. (n.) A place in a body of water where the water is not deep; a shoal; a flat; a shelf.

5. (n.) The rudd.

6. (v. t.) To make shallow.

7. (v. i.) To become shallow, as water.

airy amateur amateurish ankle-deep asinine bank bar birdbrained birdwitted catchpenny coral reef cursory dabbling depthless dilettante dilettantish empty epidermal fatuous featherbrained few fill in fill up flat flighty flimsy fluffy foolish footling ford fribble fribbling frivolous frothy futile half-assed half-baked half-cocked idle immature inane inconsequential inconsiderable insignificant jejune knee-deep light little low meager miniature negligible no great shakes not deep nugacious nugatory on the surface otiose petty picayune picayunish reef sandbank sandbar sciolistic shallow-headed shallow-minded shallow-pated shallow-rooted shallow-witted shallows shelf shoal shoal water shoals short silly silt up skin-deep slender slight small smattering sophomoric superficial surface thin tidal flats tiny trifling trite trivial unimportant unprofound vacuous vain vapid volatile wetlands windy