The Collaborative International Dictionary
co-optation
co-optation \co-optation\, cooptation \co`["o]p*ta"tion\, n. [L. co["o]ptatio.] The act of choosing; selection; choice. [Obs.]
The first election and co["o]ptation of a friend.
--Howell.
2. the selection of a new member (usually by a vote of the existing membership). See co-opt[2].
Syn: co-option.
3. the act of appointing summarily (with or without the appointee's consent).
Syn: co-option.
Wiktionary
co-optation
n. (alternative spelling of cooptation English)