Birdcage/ˈbɜːrdkeɪdʒ/ Definition 1 of 2Pro Tip 1/3Housing Birds The term 'birdcage' evokes domestic settings where people keep pet birds. She cleaned the birdcage every weekend. Pro Tip 2/3Variable Size 'Birdcage' size varies; it can be small for one bird or large enough for several. He bought a small birdcage for his canary. Pro Tip 3/3Placement Matters Birdcages are often placed where birds can have sunlight and see the environment. Their birdcage is on the balcony where the bird enjoys the sun.