what is a trellis
trellis. n. 1. (Horticulture) a structure or pattern of latticework, esp one used to support climbing plants. 2. an arch made of latticework. vb (tr). 3. to interweave (strips of wood, etc) to make a trellis. 4. to provide or support with a trellis. [C14: from Old French treliz fabric of open texture, from Late Latin trilÄ«cius woven with three threads, from Latin tri- + lÄ«cium thread].