·vi To become thick.
II. Thicken ·vt To make thick (in any sense of the word).
III. Thicken ·vt To make more frequent; as, to thicken blows.
IV. Thicken ·vt To Strengthen; to Confirm.
V. Thicken ·vt To render dense; to Inspissate; as, to thicken paint.
VI. Thicken ·vt To make close; to fill up interstices in; as, to thicken cloth; to thicken ranks of trees or men.