To change down is move the gear lever in order to change to a lower gear in a motor vehicle.
British and Australian English.
Examples of use:
1. I changed down to third gear to go up the hill.
2. Change down to second gear.
3. My car has a fault. When I change down to third gear the gear lever gets stuck.
|present simple||change down and changes down|
|-ing form||changing down|
|past simple||changed down|
|past participle||changed down|
To change up is to change to a higher gear.
Image © Ed Callow