1. to become thick or thicker
Usage: intransitive
2. to make something thick or thicker
Usage: transitive

Examples

• The sauce will thicken as it cools.
• Add flour to thicken the gravy.
• The fog began to thicken around midnight.
• She used cornstarch to thicken the soup.
• The plot thickens with each new clue.
• The cream thickened when I whipped it.
• Mix the ingredients until the batter thickens.