---
title: Spy (Dictionary)
slug: spy-dictionary
url: /detay/spy-dictionary
type: article
language: English
entity:
  primary: Spy (Dictionary)
  type: article
  disambiguation: Learn about spies: definitions, origins, and types of espionage.  Uncover secrets!
  categories:
    - name: General Knowledge
      slug: genel-kultur
      url: /kategori/genel-kultur
  tags:
    - spy
    - Dictionary
    - Intelligence
author: Ömer Said Aydın
created_at: 2025-01-11T16:55:24.516138+03:00
updated_at: 2025-04-17T12:59:07.088082+03:00
---

# Spy (Dictionary)

<!-- CONTEXT: Article Content for "Spy (Dictionary)" -->

## Article Content

### **Definition**

1. A person tasked with secretly obtaining a state's military, political, and economic secrets on behalf of another state, is known as an agent. 
2. A person who investigates learns, and reports secrets belonging to others for a certain purpose and on behalf of someone else. 

### **Origin**

The word "[casus](/en/detay/casus/llms.txt)," meaning "[spy](/en/detay/casus-sozluk-2/llms.txt)" in Turkish, originates from the Arabic word "cāsūs" (جاسوس). In Arabic, "cāsūs" describes a person who gathers information or provides [intelligence](/en/detay/istihbarat-sozluk/llms.txt). Over time, this word was adopted into Turkish as "casus," retaining the same meaning of a person who collects secret information on behalf of a state or organization. It [has](/en/detay/has-3/llms.txt) also been used similarly in both Persian and Ottoman Turkish.

### **Usage Areas**

- **Military Intelligence:** Countries employ spies during wartime or in times of crisis to gather information about enemy forces. This intelligence is crucial in shaping military strategies. 
- **Political Intelligence:** Nations or political groups engage in espionage to discover the plans or policies of their rivals. Such information is used to gain an advantage in diplomatic relations or decision-making processes. 
- **Economic Espionage:&#32;**Companies or states may conduct espionage activities to learn their competitors' trade secrets, industrial innovations, or strategic plans. These activities aim to gain a competitive edge. 
- **Technological Espionage:** This type of espionage targets institutions developing innovative technologies or conducting significant R&D activities. Information obtained in this field can be used to gain technological advantages. 
- **Cyber Espionage:** Espionage activities conducted in digital environments. The aim is to capture data, infiltrate networks, or damage digital systems. Today, this is one of the most common types of espionage. 
- **Industrial Espionage:** Activities conducted by a company to steal the trade secrets of its competitors. It typically targets information such as product formulas, customer lists, or marketing strategies. 

### **Example Sentences**

- Spies operating behind enemy lines shared crucial strategic information with their home country. 
- The spy deciphered the rival state's plans, providing a significant advantage to the government. 
- The cyber spy who infiltrated the company's computer system successfully stole sensitive data. 
- The major technology company uncovered the activities of a spy attempting to steal information from its competitors.

<!-- CONTEXT: Academic Sources and References for "Spy (Dictionary)" -->

## Academic Sources and References

1. https://lugatim.com/s/casus
2. https://sozluk.gov.tr/?ara=casus
3. https://www.nisanyansozluk.com/kelime/casus