| four-cycle | |
| —adj | |
| (US), (Canadian) Compare two-stroke Equivalent term (in Britain and certain other countries): four-stroke relating to or designating an internal-combustion engine in which the piston makes four strokes for every explosion | |
| a screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |
| a chattering or flighty, light-headed person. |