Haste; urgency; something requiring quick action. Also refers to an urgent matter or rapid pace (corresponds to the verb 急ぐ).
急ぎの用事ができたので先に帰ります。
An urgent matter came up, so I'll go home early.
報告は急ぎで作成してください。
Please prepare the report urgently.
その件は急ぎを要するため、会議は延期にならなかった。
Because that matter required urgency, the meeting was not postponed.