A stake driven into the ground.

“a picket fence”

A type of punishment by which an offender had to rest his or her entire body weight on the top of a small stake.

A tool in mountaineering that is driven into the snow and used as an anchor or to arrest falls.

To protest, organized by a labour union, typically in front of the location of employment.

To enclose or fortify with pickets or pointed stakes.

To tether to, or as if to, a picket.

“to picket a horse”