1. a very large and complex engineering or construction undertaking, typically requiring substantial investment, long planning periods, and coordination of multiple organizations
Usage: often used in business, infrastructure, and urban planning contexts; typically involves billions of dollars in funding

Examples

• The construction of the new high-speed rail network is a megaproject that will take over a decade to complete.
• Many megaprojects face budget overruns and delays due to their complexity.
• The city's megaproject to rebuild the downtown area includes new offices, apartments, and parks.
• International megaprojects like the Channel Tunnel require cooperation between multiple countries.
• Financing a megaproject of this scale requires investment from both public and private sources.
• The Olympic Games often serve as a catalyst for megaprojects in host cities.