1. A small pocketknife.

2. A small knife for mending pens.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• oenknife,
• lenknife,
• -enknife,
• 0enknife,
• pwnknife,
• psnknife,
• pdnknife,
• prnknife,
• p4nknife,
• penknive,
• pennife,
• penkife,
• penknif,
• punknife,
• panknife,
• pecksnif,
• pankife,
• pinnife,
• pineknife,
• Pepurknife

• penis envy.

The adjective form of the word "penknife" is "penknifelike".

The plural of the "penknife" can be the "penknives".

The singular of the "penknife" can be the "penknife".