What does pin oak mean?
• PIN OAK (noun) The noun PIN OAK has 2 senses: 1. fast-growing medium to large pyramidal deciduous tree of northeastern United States and southeastern Canada having deeply pinnatifid leaves that turn bright red in autumn; thrives in damp soil 2. large nearly semi-evergreen oak of southeastern United States; thrives in damp soil Familiarity information: PIN OAK used as a noun is rare.