1. Not converted into ions
   - nonionized, nonionised [Brit], unionized, nonionic 
2. Being a member of or formed into a labour union
   - organized, organised [Brit], unionized

1. Recruit for a union or organize into a union
   "We don't allow people to come into our plant and try to unionise the workers"
   - unionize 
2. Form or join a union
   - unionize, organize, organise [Brit]

See also: union, unionisation [Brit]

Type of: enrol [Brit, Cdn], enroll [N. Amer], enter, fall in, get together, inscribe, join, recruit

• high tide
• high time
• high treason
• high wind
• high wire
• high-altitude
• high-and-mighty
• high-angle fire
• high-angle gun
• high-backed
• high-bush blueberry
• high-ceilinged
• high-class
• high-crowned
• high-definition television
• high-density lipoprotein
• high-energy
• high-fidelity
• high-five
• high-flown
• high-grade
• high-handed
• high-handedly
• high-handedness
• high-hat cymbal