Fusion engine may refer to:

• Fusion engine, an engine that runs on fusion power, generally referring to a fusion rocket.
• Fusion Engine (game engine), the game engine used in Descent 3

• Hold On til the Night
• Hold On 'Til the Night
• Hold on 'til the Night
• Hold On 'til the Night
• Hold Onto Me
• Hold on to Me (song)
• Hold On To Me (song)
• Hold On to Me (song)
• Hold On (To My Love)
• Hold On to Sixteen
• Hold on to Sixteen
• Hold on to the Ones You Love
• Hold on to What
• Hold On to Your Hats
• Hold On We're Going Home
• Hold On, We're Going Home
• Hold On When You Get Love and Let Go When You Give It
• Holdout
• Holdout (architecture)
• Hold-out cross-validation
• Holdout (disambiguation)
• Holdout (real estate)
• Holdover in synchronization applications
• Holdover in Synchronization Applications
• Holdre