'Pocketknife' definitions:

Definition of 'pocketknife'

From: WordNet
noun
A knife with a blade that folds into the handle; suitable for carrying in the pocket [syn: pocketknife, pocket knife]

Definition of 'Pocketknife'

From: GCIDE
  • Pocketknife \Pock"et*knife`\, n.; pl. -knives. A knife with one or more blades, which fold into the handle so as to admit of being carried in the pocket. [1913 Webster]