1. three-sided - Adjective
2. three-sided - Adjective Satellite
Having three sides, especially three plane sides; as, a three-sided stem, leaf, petiole, peduncle, scape, or pericarp.
Source: Webster's dictionarythree sided
I've always loved three-sided patios. Courtyard plans are very common, but it's rare that it has one side open. Cesar Pelli
a trilateral figure Source: Internet
All have three-sided bodies; spruce, evergreen, or fir tops; and backs made of three to nine wooden sections (usually maple). Source: Internet
A number of types of harps are found in Africa, predominantly not of the three-sided frame-harp type found in Europe. Source: Internet
It features a three-sided fireplace, Idaho quartzite for the patio, dual staircases, a guest house, and wine cellar. Source: Internet
Four-sided box culverts are typically easier to install than three-sided flat or arched culverts, O’Dell said. Source: Internet