Adjective
Having eight sides and eight angles.
Source: Webster's dictionaryA gothic tower with a large octagonal spire was added in 1540. Source: Internet
Crokinole boards are typically octagonal or round in shape. Source: Internet
Chinese nunchaku tend to be rounded, whereas the Okinawan version has an octagonal cross-section (allowing one edge of the nunchaku to make contact with the target, increasing the damage inflicted). Source: Internet
Dr. Muayad Said described it as an octagonal body "enhanced by alcoves, some of which are blind" and noted earlier conservation work undertaken in 1935, 1963 and 1964. Source: Internet
For this reason, the magnetometers had to be situated on a long boom, one closer to the octagonal hub, the other one further away. Source: Internet
Inner and outer vestibules lead to the octagonal chapter house, which is of exceptional architectural purity. Source: Internet