1. (v. t.) To take or seize (a person) by legal process; to arrest; as, to apprehend a criminal.

2. (v. t.) To take hold of with the understanding, that is, to conceive in the mind; to become cognizant of; to understand; to recognize; to consider.

3. (v. t.) To know or learn with certainty.

4. (v. t.) To anticipate; esp., to anticipate with anxiety, dread, or fear; to fear.

5. (v. i.) To think, believe, or be of opinion; to understand; to suppose.

6. (v. i.) To be apprehensive; to fear.