GUN

[verb] [T] -nn- [esp. US] [dated] [informal]If you gun an engine, you make it operate at a higher speed.You must have been really gunning the engine to get here on time.If you gun someone down, you shoot and kill or badly injure them when they cannot defend themselves.The police officer was gunned down as he took his children to school.(informal) If you are gunning for someone, you are trying to cause trouble for them.Ever since she was dismissed from the Cabinet, she has been gunning for the Prime Minister with fiercely critical speeches.(informal) To gun for someone or something also means to support them or to try and achieve something.Which team are you gunning for?I'm gunning for a place in the semi-finals.