| surveillance | | |
| n. (act) | 1. surveillance | close observation of a person or group (usually by the police). |
| ~ police investigation, police work | the investigation of criminal activities. |
| ~ electronic surveillance | surveillance by electronic means (e.g. television). |
| ~ vigil, watch | a purposeful surveillance to guard or observe. |
| ~ stakeout | surveillance of some place or some person by the police (as in anticipation of a crime). |
| ~ surveillance of disease | the ongoing systematic collection and analysis of data about an infectious disease that can lead to action being taken to control or prevent the disease. |
| survey | | |
| n. (act) | 1. study, survey | a detailed critical inspection. |
| ~ examination, scrutiny | the act of examining something closely (as for mistakes). |
| ~ resurvey | a new survey or study. |
| n. (communication) | 2. resume, sketch, survey | short descriptive summary (of events). |
| ~ sum-up, summary | a brief statement that presents the main points in a concise form.; "he gave a summary of the conclusions" |
| n. (act) | 3. sight, survey, view | the act of looking or seeing or observing.; "he tried to get a better view of it"; "his survey of the battlefield was limited" |
| ~ looking, looking at, look | the act of directing the eyes toward something and perceiving it visually.; "he went out to have a look"; "his look was fixed on her eyes"; "he gave it a good looking at"; "his camera does his looking for him" |
| ~ eyeful | a full view; a good look.; "they wanted to see violence and they got an eyeful" |
| v. (cognition) | 4. appraise, survey | consider in a comprehensive way.; "He appraised the situation carefully before acting" |
| ~ analyse, analyze, examine, study, canvass, canvas | consider in detail and subject to an analysis in order to discover essential features or meaning.; "analyze a sonnet by Shakespeare"; "analyze the evidence in a criminal trial"; "analyze your real motives" |
| v. (perception) | 5. survey | look over carefully or inspect.; "He surveyed his new classmates" |
| ~ look | perceive with attention; direct one's gaze towards.; "She looked over the expanse of land"; "Look at your child!"; "Look--a deer in the backyard!" |
| ~ examine, see | observe, check out, and look over carefully or inspect.; "The customs agent examined the baggage"; "I must see your passport before you can enter the country" |
| ~ overlook | watch over.; "I am overlooking her work" |
| v. (perception) | 6. follow, surveil, survey | keep under surveillance.; "The police had been following him for weeks but they could not prove his involvement in the bombing" |
| ~ pursue, follow | follow in or as if in pursuit.; "The police car pursued the suspected attacker"; "Her bad deed followed her and haunted her dreams all her life" |
| v. (cognition) | 7. go over, review, survey | hold a review (of troops). |
| ~ inspect | look over carefully.; "Please inspect your father's will carefully" |
| v. (cognition) | 8. survey | make a survey of; for statistical purposes. |
| ~ analyse, analyze, examine, study, canvass, canvas | consider in detail and subject to an analysis in order to discover essential features or meaning.; "analyze a sonnet by Shakespeare"; "analyze the evidence in a criminal trial"; "analyze your real motives" |
| ~ canvass, poll, canvas | get the opinions (of people) by asking specific questions. |
| v. (cognition) | 9. survey | plot a map of (land). |
| ~ measure, quantify | express as a number or measure or quantity.; "Can you quantify your results?" |
| ~ calculate, compute, cipher, cypher, figure, reckon, work out | make a mathematical calculation or computation. |
| ~ triangulate | survey by triangulation.; "The land surveyor worked by triangulating the plot" |
| spy | | |
| n. (person) | 1. spy, undercover agent | (military) a secret agent hired by a state to obtain information about its enemies or by a business to obtain industrial secrets from competitors. |
| ~ armed forces, armed services, military, military machine, war machine | the military forces of a nation.; "their military is the largest in the region"; "the military machine is the same one we faced in 1991 but now it is weaker" |
| ~ counterspy, mole | a spy who works against enemy espionage. |
| ~ double agent | a spy who works for two mutually antagonistic countries. |
| ~ espionage agent | someone employed to spy on another country or business competitor. |
| ~ foreign agent | a spy for a foreign country. |
| ~ infiltrator | someone who takes up a position surreptitiously for the purpose of espionage. |
| ~ intelligence agent, intelligence officer, operative, secret agent | a person secretly employed in espionage for a government. |
| ~ sleeper | 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. |
| ~ margarete gertrud zelle, mata hari | Dutch dancer who was executed by the French as a German spy in World War I (1876-1917). |
| n. (person) | 2. spy | a secret watcher; someone who secretly watches other people.; "my spies tell me that you had a good time last night" |
| ~ snoop, snooper | a spy who makes uninvited inquiries into the private affairs of others. |
| ~ looker, spectator, viewer, watcher, witness | a close observer; someone who looks at something (such as an exhibition of some kind).; "the spectators applauded the performance"; "television viewers"; "sky watchers discovered a new star" |
| ~ shadower, tail, shadow | a spy employed to follow someone and report their movements. |
| v. (perception) | 3. descry, espy, spot, spy | catch sight of. |
| ~ sight, spy | catch sight of; to perceive with the eyes.; "he caught sight of the king's men coming over the ridge" |
| v. (communication) | 4. sleuth, snoop, spy, stag | watch, observe, or inquire secretly. |
| ~ enquire, investigate, inquire | conduct an inquiry or investigation of.; "The district attorney's office investigated reports of possible irregularities"; "inquire into the disappearance of the rich old lady" |
| ~ monitor, supervise | keep tabs on; keep an eye on; keep under surveillance.; "we are monitoring the air quality"; "the police monitor the suspect's moves" |
| v. (perception) | 5. sight, spy | catch sight of; to perceive with the eyes.; "he caught sight of the king's men coming over the ridge" |
| ~ perceive, comprehend | to become aware of through the senses.; "I could perceive the ship coming over the horizon" |
| ~ descry, espy, spot, spy | catch sight of. |
| ~ detect, discover, notice, observe, find | discover or determine the existence, presence, or fact of.; "She detected high levels of lead in her drinking water"; "We found traces of lead in the paint" |
| v. (communication) | 6. spy | secretly collect sensitive or classified information; engage in espionage.; "spy for the Russians" |
| ~ enquire, investigate, inquire | conduct an inquiry or investigation of.; "The district attorney's office investigated reports of possible irregularities"; "inquire into the disappearance of the rich old lady" |
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