Bilge/bɪldʒ/ Definition 1 of 2Pro Tip 1/3Ship Anatomy Understand that 'bilge' refers to a specific area in a ship's structure. The crew checked the bilge for leaks. Pro Tip 2/3Technical Term 'Bilge' is used in a technical context, especially concerning boats and ships. We need to install a new bilge pump. Pro Tip 3/3Maintenance Issues 'Bilge' can imply problems like water leakage requiring attention. After the storm, the bilge was full.