- any of several ornamental or timber-producing evergreen trees belonging to the genus Thuja, of the cypress family, native to North America and eastern Asia, having a scaly bark and scalelike leaves on branchlets.
- Anatomy. arbor vitae.
Origin of arborvitae
1655–65 for def 1; 1790–1800 for def 2; < Latin: tree of life
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018