noun
selection state; selected state
Technical term used in computing, UI design, and formal contexts to describe whether an item is selected or the condition of being selected.
チェックボックスの選択状態を確認してください。
Please check the selection state of the checkbox.
このボタンは選択状態によって色が変わります。
This button changes color depending on its selected state.
Compound of 選択 (selection) and 状態 (state). A straightforward technical term with no obscure historical derivation.