Pocketknife (noun)

A small, portable folding knife, often carried in a pocket.

Origin:

A small folding knife, typically with one or more blades that fit inside the handle, which can be carried in a pocket.

Examples:

1. He always carried a pocketknife in his pocket for everyday use.
2. The scouts were taught how to sharpen sticks for roasting marshmallows with their pocketknives.
3. The pocketknife came in handy when he needed to open a package.
4. The pocketknife had a variety of tools such as a bottle opener and a can opener.
5. The pocketknife had a lock to prevent it from closing while in use.