1. a botanical garden devoted to trees and shrubs

Examples

• The university’s arboretum contains over 200 species of native trees.
• We took a peaceful walk through the arboretum on Sunday morning.
• The arboretum is especially beautiful in autumn when the leaves change color.
• Students often study botany by examining specimens in the campus arboretum.
• The new arboretum will feature rare oak and maple varieties.
• Visitors can follow marked trails throughout the 50-acre arboretum.