1. an area on a hostile shore occupied by an advancing army to secure further landing of troops and supplies
Usage: military
2. a secure initial position that has been gained and can be used for further advancement
Usage: figurative

Examples

• The troops established a beachhead on the enemy coast.
• Allied forces expanded their beachhead during the invasion.
• The company used its success in Asia as a beachhead for global expansion.
• The new store served as a beachhead in the competitive market.
• They needed to secure a beachhead before launching the full campaign.
• The startup gained a beachhead in the tech industry with its innovative app.