Not intellectually deep; not penetrating deeply; simple; not wise or knowing.
Not steep; close to horizontal.
Not far forward, close to the net.
Having little depth; significantly less deep than wide.
Concerned mainly with superficial matters.
Extending not far downward.
Lacking interest or substance.
A costermonger's barrow.
A shallow portion of an otherwise deep body of water.
A fish, the rudd.
To make or become less deep.
Having a covert or hidden meaning.
Reasonably large in number or amount.
Having a low probability of occurring by chance (for example, having high correlation and thus likely to be related).
Having a noticeable or major effect.
Signifying something; carrying meaning.
That which has significance; a sign; a token; a symbol.