Definitions
1.NounAgent noun of load; a person or device that loads."There was only one loader for the truck today so it took him a long time to get everything moved.; The auto-loader on the gun kept jamming so they did it manually."
2.NounA program that prepares other programs for execution.
3.NounA tractor with a scoop, for example: front-end loader, front loader, endloader, payloader, bucket loader, tracked loader, wheel loader, etc.
Ellipsis of backhoe loader
4.NounEllipsis of backhoe loader
5.NounAn incentive given to a dealer.