Waves that break on an ocean shoreline.
"The surf was so high today that we had to wait for a long time before it finally cleared up enough to go in."
In plain English: Surf is the waves that crash onto the shore.
"She spent her entire summer vacation learning how to surf on the beach."
switch channels, on television
"I can't watch my favorite show because I accidentally surfed past it while changing channels."
To ride a wave, usually on a surfboard.
"After hours of waiting for the right conditions, he finally managed to catch a massive wave and surf all the way down the line."
In plain English: To surf is to ride waves on a board while floating on the water.
"He loves to surf every time he goes to the beach."
Usage: Use this verb to describe riding ocean waves while standing or lying on a board; do not use it metaphorically for browsing the internet unless specifically distinguishing between physical and digital contexts. Avoid confusing it with "swim," as surfing requires balancing equipment rather than just moving through water.
The noun likely comes from Middle English suffe, meaning "the inrush of the sea towards the shore," before entering modern usage to describe riding ocean waves. While some theories suggest an Indo-Aryan origin linked to India, these are considered doubtful due to a lack of identifiable source words.