To bend something flexible and lay it over itself, often to make it smaller or to create a crease. She folded the letter neatly before placing it in the envelope.
To bring an end to an operation or activity, often due to failure or lack of success. The company had to fold after several unsuccessful years.
In poker, to withdraw from a hand by discarding one's cards. He decided to fold after seeing his weak hand.
To incorporate an ingredient into a mixture by gently turning it over with a spoon or spatula. Fold the whipped cream into the chocolate mixture until well combined.