They 'struck a blow' for freedom and against tyranny. [=they did something that helped freedom and opposed tyranny]
She 'struck' the right note/tone with her speech. [=she said things in a way that appealed to her audience]
The doctor 'was struck off' for unethical practices. [=the doctor is no longer allowed to practice]
(..) the others, that Harry is back. Okay, okay! Let's not kill him before You-Know-Who does. ... Do you read? We've a new weather report. Lightning has struck. I repeat: Lightning has struck. What's the fun, Harry? Okay. There's something we need to find. Something hidden here, in the castle. (..)2011 Harry Potter and the Deathly Hallows: Part 2