The National Capital Region is a central planning region centred upon the National Capital Territory in India. It encompasses the entire NCT of Delhi and several districts surrounding it from the states of Haryana, Uttar Pradesh and Rajasthan.

Full form of NCR in Delhi-NCR
NCR stands for National Capital Region in the context of Delhi-NCR. It refers to the metropolitan area that encompasses the nation's capital, Delhi, along with several neighboring cities and districts. The NCR is a significant urban agglomeration that spans across multiple states and serves as a major economic, political, and cultural hub in Northern India.

Explanation in detail
The National Capital Region (NCR) is a designated planning region comprising various cities and districts that surround Delhi. It was established in 1985 to promote balanced regional development and to alleviate the pressure on Delhi's infrastructure and resources. The NCR is spread across the states of Delhi, Haryana, Uttar Pradesh, and Rajasthan.

Key cities in Delhi-NCR
The NCR includes several prominent cities, some of which are:

1. Delhi: Being the national capital, Delhi is the central city of the NCR. It is a major political, administrative, and cultural center in India.

2. Gurgaon (now Gurugram): Located in Haryana, Gurgaon is a leading financial and industrial hub. It is home to numerous multinational corporations and has witnessed rapid urbanization and economic growth.

3. Noida: Situated in Uttar Pradesh, Noida is known for its thriving IT and software services industry. It houses various multinational companies and has emerged as a popular residential and commercial destination.

4. Ghaziabad: Located in Uttar Pradesh, Ghaziabad is an industrial city with a rich historical background. It has witnessed significant urban development and is well-connected to Delhi through various transport networks.

5. Faridabad: Situated in Haryana, Faridabad is an industrial city known for its manufacturing and engineering sectors. It is one of the leading contributors to the state's economy.

Importance of NCR in Delhi-NCR
The NCR plays a crucial role in various aspects, including:

1. Economic significance: The region contributes significantly to the national economy through various industries, businesses, and services. It attracts investments, generates employment opportunities, and fuels economic growth.

2. Infrastructure development: The NCR witnesses continuous infrastructure development to cater to the growing population and urbanization. It includes the construction of highways, metro rail networks, airports, and other essential facilities.

3. Cultural and educational hub: The NCR is home to numerous cultural and educational institutions, including museums, art galleries, universities, and research centers. It serves as a center for cultural exchange and academic excellence.

4. Administrative and political importance: The NCR's proximity to the national capital makes it an essential administrative and political center. It houses various government offices, ministries, and institutions.

5. Connectivity and transportation: The NCR is well-connected through an extensive network of roads, highways, railways, and airports. It facilitates easy movement of people, goods, and services within the region and beyond.

In conclusion, the NCR in Delhi-NCR refers to the National Capital Region, which comprises Delhi and its surrounding cities and districts. It holds immense economic, political, and cultural significance and serves as a prime example of regional planning and development.