• Webster's Revised Unabridged Dictionary
    • v. i Disenroll To erase from a roll or list.
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Century Dictionary and Cyclopedia
    • disenroll To erase from a roll or list. Also spelled disenrol.
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In science:

Disenrollment: Suppose the weight of an each player is decreased by one, then participants are combined to work together and upgrade all shares except in one share of the non-cooperative player.
Social Secret Sharing for Resource Management in Cloud