fold

1. (noun) An act of folding. 2. (noun) A bend or crease. 3. (noun) Any correct move in origami. 4. (noun) (newspapers) The division between the top and bottom halves of a broadsheet: headlines above the fold will be readable in a newsstand display; usually the fold. 5. (noun) (by extension) The division between the part of a web page visible in a web browser window without scrolling; usually the fold. 6. (noun) That which is folded together, or which enfolds or envelops; embrace. 7. (noun) The bending or curving of one or a stack of originally flat and planar surfaces, such as sedimentary strata, as a result of plastic (i.e. permanent) deformation. 8. (noun) In functional programming, any of a family of higher-order functions that process a data structure recursively to build up a value. 9. (noun) A section of source code that can be collapsed out of view in an editor to aid readability. 10. (verb) To bend (any thin material, such as paper) over so that it comes in contact with itself. 11. (verb) To make the proper arrangement (in a thin material) by bending. 12. (verb) To become folded; to form folds. 13. (verb) To fall over; to be crushed. 14. (verb) To enclose within folded arms (see also enfold). 15. (verb) To give way on a point or in an argument. 16. (verb) To withdraw from betting. 17. (verb) (by extension) To withdraw or quit in general. 18. (verb) To stir gently, with a folding action. 19. (verb) Of a company, to cease to trade. 20. (verb) To double or lay together, as the arms or the hands. 21. (verb) To cover or wrap up; to conceal.