1. in a way that is extremely important or essential; at a critical point

Examples

• The timing of the announcement was crucially important to the campaign.
• She arrived crucially late to the meeting.
• The experiment depends crucially on maintaining the correct temperature.
• His testimony was crucially needed to solve the case.
• The team performed crucially well in the final minutes.
• The decision will crucially affect our future plans.
• The bridge was crucially damaged in the earthquake.