Freebase(0.00 / 0 votes)Rate this definition: Imagism was a movement in early 20th-century Anglo-American poetry that favored precision of imagery and clear, sharp language. It has been described as the most influential movement in English poetry since the activity of the Pre-Raphaelites.
The Spring Trigger. A spring trigger is actually a small spring with a threaded end that replaces the hard trigger on specially made index-triggered releases. Because it bends when you pull it, the spring is very difficult to punch. Your only recourse is to keep pulling as you continue to aim at the spot you want to hit.
A press of the trigger completes full loading of the striker spring, and releases the striker. If this is basically correct, then this is arguably double-action in the strictest sense I've defined. I fully understand I may not have the operation of a Glock (or most Glocks, if they aren't all the same) completely right.