of little depth; not deep

shallow water.

lacking depth; superficial

a mind that is not narrow but shallow.

taking in a relatively small amount of air in each inhalation

shallow breathing.

Baseball . relatively close to home plate

The shortstop caught the pop fly in shallow left field.

Usually, shallows. ( used with a singular or plural verb ) a shallow part of a body of water; shoal.

Baseball . at a shallow position

With the pitcher up, the outfielders played shallow.

to make or become shallow.

adjective

deep , aware , considered , intelligent , thoughtful

adjective

cursory , depthless , empty , flat , hollow , inconsiderable , sand bar , shelf , shoal , slight , superficial , surface , trifling , trivial , unsoundnotes:callow means lacking experience of life , immature - while shallow means lacking depth of intellect , emotion , or knowledge , empty-headed , farcical , featherbrained , flighty , flimsy , foolish , frivolous , frothy , half-baked * , idle , inane , lightweight , meaningless , paltry , petty , piddling , puerile , simple , sketchy , skin-deep * , uncritical , unthinking , vain , wishy-washy *notes:callow means lacking experience of life , one-dimensional , skin-deep , artificial , cosmetic , facile , glib , incondite , magazinish , senseless , sophomoric , specious , tenuous , token , weak