Definitions of fold:

• noun:   the act of folding

  Example: "He gave the napkins a double fold"

• noun:   a pen for sheep
• noun:   a folded part (as a fold of skin or muscle)
• noun:   an angular or rounded shape made by folding

  Example: "A fold in the napkin"

• noun:   a group of people who adhere to a common faith and habitually attend a given church
• verb:   incorporate a food ingredient into a mixture by repeatedly turning it over without stirring or beating

  Example: "Fold the egg whites into the batter"

• verb:   become folded or folded up

  Example: "The bed folds in a jiffy"

• verb:   bend or lay so that one part covers the other

  Example: "Fold up the newspaper"

• verb:   intertwine

  Example: "Fold one's hands, arms, or legs"

• verb:   cease to operate or cause to cease operating
• verb:   confine in a fold, like sheep