[from any of various machines' instruction sets]
1. vi. To move oneself to the left (right). To move out of the way.
2. imper. Get out of my seat! You can shift to that empty
one to the left (right).
Often used without the logical, or as left
shift instead of shift
left. Sometimes heard as LSH /lish/, from the
PDP-10 instruction set. See
Programmer's Cheer.