red juniper red·ju·ni·per uncommon noun 1. small juniper found east of Rocky Mountains having a conic crown, brown bark that peels in shreds, and small sharp needles Synonymseastern red cedarred cedarred juniperJuniperus virginiana Related words Broader terms pencil cedar WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.