twinned (Adjective) — Being the same, or having similar design, colour, etc, as another.
twinned (Verb) — Duplicate or match. ex. "The polished surface twinned his face and chest in reverse"
twinned (Verb) — Bring two objects, ideas, or people together. ex. "Matchmaker, can you twin my daughter with a nice young man?"
twinned (Verb) — Grow as twins. ex. "twin crystals"
twinned (Verb) — Give birth to twins.