Deepen :: Deepen (v. t.) To make deep or deeper; to increase the depth of; to sink lower; as, to deepen a well or a channel..
Deepen :: Deepen (v. t.) To make darker or more intense; to darken; as, the event deepened the prevailing gloom..
Deepen :: Deepen (v. t.) To make more poignant or affecting; to increase in degree; as, to deepen grief or sorrow..
Deepen :: Deepen (v. t.) To make more grave or low in tone; as, to deepen the tones of an organ..
Deepen :: Deepen (v. i.) To become deeper; as, the water deepens at every cast of the lead; the plot deepens..