Synonyms: security, security measures
Definition: measures taken as a precaution against theft or espionage or sabotage etc.
Usage: military security has been stepped up since the recent uprising
Similar words: safeguard, precaution, guard
Definition: a precautionary measure warding off impending danger or damage or injury etc.
Usage: he put an ice pack on the injury as a precaution; an insurance policy is a good safeguard; we let our guard down