'Foliage' definitions:

Definition of 'foliage'

noun

The main organ of photosynthesis and transpiration in higher plants [syn: leaf, leafage, foliage]

noun

(architecture) leaf-like architectural ornament [syn: foliation, foliage]

From: GCIDE

Foliage \Fo"li*age\, v. t. To adorn with foliage or the imitation of foliage; to form into the representation of leaves. [R.] --Drummond. [1913 Webster]

From: GCIDE

Foliage \Fo"li*age\, n. [OF. foillage, fueillage, F. feuillage, fr. OF. foille, fueille, fueil, F. feulle, leaf, L. folium. See 3d Foil, and cf. Foliation, Filemot.] [1913 Webster]
1. Leaves, collectively, as produced or arranged by nature; leafage; as, a tree or forest of beautiful foliage. [1913 Webster]
2. A cluster of leaves, flowers, and branches; especially, the representation of leaves, flowers, and branches, in architecture, intended to ornament and enrich capitals, friezes, pediments, etc. [1913 Webster]
Foliage plant (Bot.), any plant cultivated for the beauty of its leaves, as many kinds of Begonia and Coleus. [1913 Webster]