What is the meaning of Shallow?

Having little depth; significantly less deep than wide.

Extending not far downward.

Concerned mainly with superficial matters.

Lacking interest or substance; flat; one-dimensional.

Not intellectually deep; not penetrating deeply; simple; not wise or knowing.

Not deep in tone.

Not far forward, close to the net.

Not steep; close to horizontal.

A shallow portion of an otherwise deep body of water.

A fish, the rudd.

A costermonger's barrow.

To make or become less deep.

Source: wiktionary.org