Origin: Latin prefix pre-
Preset has 4 different meanings across 1 category:
Something that is set in advance.
"The timer on my alarm clock was preset to ring at 6 AM, so I woke up without having to hit snooze."
To set something in advance.
"She liked that the coffee maker had a preset timer so her morning brew was ready exactly when she woke up."
Set in advance, or as a default.
"The radio stayed on my favorite station because I had preset it before leaving home."