Entry 1 sense Webster, 1913 Amber tree /ăm'-bẽr trē/ · Am·ber tree · IPA 01 A species of Anthospermum, a shrub with evergreen leaves, which, when bruised, emit a fragrant odor. 1. A species of Anthospermum, a shrub with evergreen leaves, which, when bruised, emit a fragrant odor.