Definitions
1.NounA mine that is placed on land and designed to explode when stepped upon or touched.
2.NounA critical subject or situation with concealed or unpredictable implications.
3.NounA piece of exercise device consisting of a pivoting tube attached to the ground to which a barbell can be fitted to lift it off the ground.
4.NounA pile of uncollected dog poop left in a space (like a sidewalk, park, or common lawn) that someone might accidentally step in.