noun

1. a structure of thin strips, esp. of wood, crossing each other in an open pattern of squares, diamonds, etc., on which vines or other creeping plants are trained; lattice
2. a bower, archway, etc. of this

Etymology: ME trelis < OFr treliz < VL *trilicius, coarse cloth < L trilix, triple-twilled (see drill): infl. by OFr treille, arbor: see treillage

transitive verb

1. to furnish with, or train on, a trellis
2. to cross or interweave like a trellis