P.I.
Hired sleuth, unlicensed
P.I. is an abbreviation for private investigator—a person hired to conduct surveillance, find missing people, or gather information outside official law enforcement.
The term appears constantly in detective fiction: The P.I. tailed the suspect across town.
P.I. can also stand for principal investigator, the lead researcher on a scientific study or grant.
Informal term for detective
- sleuthPrivate investigator
- detective agencyCompany offering investigative services
- surveillanceSystematic observation of subjects
- stakeoutProlonged covert observation
magnifying glass · noir · Sam Spade · case file · missing persons · infidelity · background check · tailing
Circle's fundamental ratio
- circumferenceCircle's outer measurement
- diameterDistance across through center
- ratioComparative numerical relation
- circleCurved closed shape
irrational number · transcendental · Archimedes · radius · geometry · constant · area · trigonometry
Pathogen invasion causing illness
- reproductiveRelated to producing offspring
- fallopian tubesDucts linking ovaries to womb
- STISexually transmitted infection
- chlamydiaBacterial venereal infection
gonorrhea · inflammation · gynecology · antibiotics · fertility · scarring · ectopic pregnancy · symptoms
gumshoe
Informal term for detective
- sleuthPrivate investigator
- detective agencyCompany offering investigative services
- surveillanceSystematic observation of subjects
stakeout · magnifying glass · noir · Sam Spade · case file · missing persons · infidelity · background check · tailing · undercover
pi
Circle's fundamental ratio
- circumferenceCircle's outer measurement
- diameterDistance across through center
- ratioComparative numerical relation
circle · irrational number · transcendental · Archimedes · radius · geometry · constant · area · trigonometry · radian
infection
Pathogen invasion causing illness
- reproductiveRelated to producing offspring
- fallopian tubesDucts linking ovaries to womb
- STISexually transmitted infection
chlamydia · gonorrhea · inflammation · gynecology · antibiotics · fertility · scarring · ectopic pregnancy · symptoms · diagnosis
archipelago
Chain of scattered islands
Mindanao · Southeast Asia · Pacific · colonial · historical · territory · islands · tropical · prewar · designation
P.I.police officer
Law enforcement agent
cop · detective · federal agent · FBI agent · police detective
P.I.suspect
Believe to be likely
perpetrator · criminal · target · person of interest · fugitive
private, investigator, investigate, investigation, investigative, investigator's, privately, privacy, privation