—v.t. 1. to take hold of suddenly or forcibly; grasp: to seize a weapon. 2. to grasp mentally; understand clearly and completely: to seize an idea. 3. to take possession of by force or at will: to seize enemy ships. 4. to take possession or control of as if by suddenly laying hold: Panic seized the crowd. 5. to take possession of by legal authority; confiscate: to seize smuggled goods. 6. Also,seise.Law.to put (someone) in seizin or legal possession of property (usually used in passive constructions): She was seized of vast estates. 7. to capture; take into custody.
8. to take advantage of promptly: to seize an opportunity. 9. Naut.to bind or fasten together with a seizing.
—v.i. 1. to grab or take hold suddenly or forcibly (usually fol. by on or upon): to seize on a rope. 2. to resort to a method, plan, etc., in desperation (usually fol. by on or upon): He must seize on a solution, however risky. 3. to have moving parts bind and stop moving as a result of excessive pressure, temperature, or friction (usually fol. by up): The engine seized up from cold.