just the opposite, esp. of something said or believed.

The evidence of history, on the contrary, shows that these ancient people had a very advanced culture.

Usage notes: often used to disagree with someone or something and to present new information

• knock someone out
• knock someone's block off
• knock someone sideways
• knock someone's socks off
• knock someone up
• knock some sense into
• knock some sense into someone
• knock something down
• knock something into shape
• knock something off
• knock something on the head
• knock something out
• knock something's socks off
• knock spots off
• knock spots off someone
• knock spots off something
• knock the bottom out of
• knock the bottom out of something
• knock the daylights out of
• knock the daylights out of someone
• knock the living daylights out of
• knock the living daylights out of someone
• knock them dead
• knock the stuffing out of
• knock the stuffing out of someone