1. With the involvement of two parties or governments
   "they worked out an agreement bilaterally" 
2. So as to involve two sides or parts

See also: bilateral

• purple osier
• purple passage
• purple patch
• purple pea
• purple poppy mallow
• purple rock brake
• purple sage
• purple sanicle
• purple saxifrage
• purple silkweed
• purple strawberry guava
• purple trillium
• purple velvet plant
• purple virgin's bower
• purple willow
• purple-black
• purple-blue
• purple-brown
• purple-eyed
• schoolmistress
• schoolroom
• schoolteacher
• schooltime
• schoolwide
• schoolwork