Trespass
Definition 1 of 4
Pro Tip 1/2
Legality
Trespassing often implies illegal entry, which can result in legal consequences. Putting up signs can help deter people from illegally trespassing.
Pro Tip 2/2
Implicit Permission
Some places have unspoken rules allowing entry without explicit permission, not an act of trespass. Walking through the open gate of a park isn't considered trespassing.