1. To end or finish something suddenly and unexpectedly, without warning or proper preparation
The meeting abruptly concluded when the fire alarm went off.
A reunião concluiu abruptamente quando o alarme de incêndio disparou.
2. To terminate a discussion, event, or action in a hasty manner without proper closure
He abruptly concluded the presentation and left the room.
Ele concluiu a apresentação abruptamente e saiu da sala.