You cannot pick them up, feel them, weigh them, use them as doorstops, trip over them.
Because of that, we have seen a huge decline in political membership and in activity on the doorstop.
The proposal for a directive on doorstop selling was briefly discussed.
My father—a very law-abiding man—had as his doorstop an artillery shell.
He and his family kept it as a doorstop until 1802.
For three years, the rock served as a bulky doorstop.
However, some reviewers felt the book was excessively long, referring to it as a doorstop.
Shells are made into cameos, bracelets and lamps, and traditionally as doorstops or decorations by families of seafaring men.