seizure

noun

sei·​zure ˈsē-zhər 

1

a

: the act, action, or process of seizing : the state of being seized

b

: the taking possession of person or property by legal process

2

a

: a sudden attack (as of disease)

especially : the physical manifestations (such as convulsions, sensory disturbances, or loss of consciousness) resulting from abnormal electrical discharges in the brain (as in epilepsy)

b

: an abnormal electrical discharge in the brain

Synonyms of seizure

• bout
• attack
• case
• spell

Examples of seizure in a Sentence

the seizure of power by the rebels

property that is protected from seizure

the seizure of evidence by the police

Not all searches and seizures by the police require a warrant.

Recent Examples on the Web

The syndrome, which is characterized by multiple daily seizures, impacts brain health and can lead to various disabilities. — Yi-Jin Yu, ABC News, 13 July 2026

The Food and Drug Administration has warned that using kratom can cause serious adverse events like liver toxicity and seizures. — Jake Rosenwasser, CBS News, 13 July 2026

The seizures were conducted during the execution of six search warrants in the area. — Lillie Davidson, Fort Worth Star-Telegram, 11 July 2026

One provides coverage for medically necessary seizure detection devices, and another gives drivers a way to settle disputes with insurers over whether a car should be totaled or repaired. — Steve Sadin, Chicago Tribune, 10 July 2026

Word History

First Known Use

15th century, in the meaning defined at sense 1a

Phrases Containing seizure

• anti-seizure
• grand mal seizure

Kids Definition

seizure

noun

sei·​zure ˈsē-zhər 

1

: the act of seizing : the state of being seized

2

: a sudden attack (as of disease)

especially : the physical signs (as extreme twitching of muscles) of an episode of abnormal brain activity (as in epilepsy)

Medical Definition

seizure

noun

sei·​zure ˈsē-zhər 

1

: a sudden attack (as of disease)

especially : the physical manifestations (as convulsions, sensory disturbances, or loss of consciousness) resulting from abnormal electrical discharges in the brain (as in epilepsy)

2

: an abnormal electrical discharge in the brain

Legal Definition

seizure

noun

sei·​zure ˈsē-zhər 

: the act, fact, or process of seizing: as

a

: the seizing of property that involves meaningful interference with a person's possessory interest in it

seizure of evidence found in plain view

see also plain view sense 2

b

: the seizing of a person (as for arrest or investigation) see also arrest, stop compare search

Note: The Fourth Amendment to the U.S. Constitution guarantees the right against unreasonable searches and seizures. It requires that a warrant may issue only upon probable cause, and that the warrant particularly describe the persons or things to be seized. Not all seizures, however, require a warrant. A seizure that constitutes an arrest requires probable cause to be reasonable, and a stop usually requires reasonable suspicion of the particular person or persons stopped, although stops like those at drunk driving checkpoints may be justified by a plan that places explicit and neutral limitations on the conduct of police officers with no requirement of individualized suspicion.