v.tr.1. To grasp suddenly and forcibly; take or grab: seize a sword.
2. a. To take by force; capture or conquer: The kidnappers seized the prince. The invaders seized the city.
b. To take quick and forcible possession of; confiscate: The police seized a cache of illegal drugs.
3. a. To focus the attention or intellect on: seize an idea and develop it to the fullest extent.
b. To make use of (an opportunity, for example).
4. a. To have a sudden overwhelming effect on: a heinous crime that seized the minds and emotions of the populace.
b. To overwhelm physically: a person who was seized with a terminal disease.
5. also seise (sēz) Law To cause (someone) to be in possession of something.
6. Nautical To bind (a rope) to another, or to a spar, with turns of small line.
v.intr.1. To lay sudden or forcible hold of something.
2. a. To cohere or fuse with another part as a result of high pressure or temperature and restrict or prevent further motion or flow.
b. To come to a halt: The talks seized up and were rescheduled.
3. To exhibit signs of seizure activity, often with convulsions.