Strikingly means in a way that grabs your attention or makes a strong impression. When something is done strikingly, it stands out so much you can't help but notice it.

You might read that two sisters look strikingly similar, meaning their resemblance is so strong it surprises people. A building might be strikingly beautiful, catching everyone's eye as they walk past. A chess player might make a strikingly bold move that changes the entire game in an unexpected way.

The word suggests something remarkably or impressively noticeable. A picture might be pretty, but a strikingly vivid photograph makes you stop and stare. A student might be smart, but a strikingly intelligent answer might make the whole class pause in admiration.