A portable light source, often used outdoors or for camping. The word is a direct loan from English.
I use a lantern when camping.
We turned on the lantern and had dinner at the campsite.
I turned off the lantern before going to sleep.
I hung a lantern at the entrance of the tent.
The all-purpose counter for small discrete objects, used when no more specific counter applies.
Used when referring to electric lights or light fixtures; for a lantern, 個 is the more general native choice from this inventory.
jack-o'-lantern
Borrowed from English 'lantern'.