1. not arranged in a stack or pile

1. past tense and past participle of unstack: removed from a stack or pile

Examples

• The books lay unstacked across the table.
• She left the dishes unstacked in the sink.
• The chairs were unstacked and arranged in rows.
• He unstacked the boxes to find the one he needed.
• The papers remained unstacked after the meeting.
• They unstacked the plates from the dishwasher.
• The unstacked magazines covered the entire floor.