Sleeper
nounverified·updated May 18, 2026
a spy or saboteur or terrorist planted in an enemy country who lives there as a law-abiding citizen until activated by a prearranged signal
polysemous
Classifications
Entity Type
Unknown—glossary_import_default_pending_classifier
?unassignedlast reviewed —
Sensitivity
unclassified
Information Class
unclassified
Variants
- synonym
- crosstierailroad tiesleeper gobysleeping carslumberertiewagon-lit
- plural
- Sleepers
- possessive
- Sleeper's
- pluralpossessive
- Sleepers'