A type of large tree that grows in northern areas of the world, or the wood of this tree. (Cambridge Dictionary)
A maple or a maple tree is a tree with five-pointed leaves which turn bright red or gold in autumn. (Collins Dictionary)
Any of a genus (Acer of the family Aceraceae, the maple family) of chiefly deciduous trees or shrubs with opposite leaves and a fruit of two united samaras. (Merriam – Webster)
A tree or shrub with lobed leaves, winged fruits, and colourful autumn foliage, grown as an ornamental or for its timber or syrupy sap. (Oxford Dictionaries)
In the Garden: Japanese Maples.