Merriam-Webster Collegiate Dictionary - fold

 suffix  Etymology: Middle English, from Old English -feald; akin to Old High German -falt ~, Latin -plex, -plus, Old English fealdan  1. multiplied by (a specified number) ; times — in adjectives a sixfold increase and adverbs repay you tenfold  2. having (so many) parts threefold aspect of the problem FOLD  I. noun  Etymology: Middle English, from Old English falod; akin to Old Saxon faled enclosure  Date: before 12th century  1. an enclosure for sheep  2.  a. a flock of sheep  b. a group of people or institutions that share a common faith, belief, activity, or enthusiasm  II. transitive verb  Date: before 12th century to pen up or confine (as sheep) in a ~  III. verb  Etymology: Middle English, from Old English fealdan; akin to Old High German faldan to ~, Greek diplasios two~  Date: before 12th century  transitive verb  1. to lay one part over another part of ~ a letter  2. to reduce the length or bulk of by doubling over ~ a tent  3. to clasp together ; entwine ~ the hands  4. to clasp or enwrap closely ; embrace  5. to bend (as a layer of rock) into ~s  6.  a. to incorporate (a food ingredient) into a mixture by repeated gentle overturnings without stirring or beating  b. to incorporate closely  7.  a. to concede defeat by withdrawing (one's cards) from play (as in poker)  b. to bring to an end  intransitive verb  1. to become doubled or pleated  2. to fail completely ; collapse; especially to go out of business  3. to ~ one's cards (as in poker)  • ~able adjective  IV. noun  Date: 13th century  1. a part doubled or laid over another part ; pleat  2. something that is ~ed together or that en~s  3.  a. a bend or flexure produced in rock by forces operative after the depositing or consolidation of the rock  b. chiefly British an undulation in the landscape  4. a margin apparently formed by the doubling upon itself of a flat anatomical structure (as a membrane)  5. a crease made by ~ing something (as a newspaper)