noun
1. the selection of a new member (usually by a vote of the existing membership) (Freq. 8)
• Syn: ↑co-option
• Hypernyms: ↑election
2. the act of appointing summarily (with or without the appointee's consent)
• Syn: ↑co-option
• Hypernyms: ↑appointment, ↑assignment, ↑designation, ↑naming
Useful english dictionary. 2012.