[{"Bold_text": "noun", "List Items": ["the rear part of the human body, extending from the neck to the lower end of the spine.", "the part of the body of animals corresponding to the human back.", "the rear portion of any part of the body:the back of the head.", "the whole body, with reference to clothing:the clothes on his back.", "ability for labor; effort or strength:He put his back into the task.", "the part opposite to or farthest from the front; the rear part:the back of a hall.", "the part that forms the rear of any object or structure:the back of a chair.", "the area directly behind a person:Face the town with the river at your back and follow the main street up the hill.", "the part that covers the back:the back of a jacket.", "the spine or backbone:The fall broke his back.", "any rear part of an object serving to support, protect, etc.:the back of a binder.", "Nautical, Aeronautics.the forward side of a propeller blade ( face,def22 face,def22).", "Aeronautics.the top part or upper surface of an aircraft, especially of its fuselage.", "Bookbinding.the edge of a book formed where its sections are bound together.", "the backs,grounds along the River Cam in back of certain colleges at Cambridge University in England: noted for their great beauty.", "Architecture. extrados .", "Carpentry.the upper side of a joist, rafter, handrail, etc.the area of interior wall between a window stool and the floor.", "the upper side of a joist, rafter, handrail, etc.", "the area of interior wall between a window stool and the floor.", "Mining.the roof of a stope or drift.", "Sports.a player whose regular position is behind that of players who make initial contact with the opposing team, as behind the forward line in football or nearest the player's own goal in polo.the position occupied by this player.", "a player whose regular position is behind that of players who make initial contact with the opposing team, as behind the forward line in football or nearest the player's own goal in polo.", "the position occupied by this player."]}, {"Bold_text": "verb (used with object)", "List Items": ["to support, as with authority, influence, help, or money (often followed byup):to back a candidate;to back up a theory with facts.Synonyms: endorse , countenance , assist , favor , abet , sustain", "to bet on:to back a horse in the race.", "to cause to move backward (often followed byup):to back a car.", "to furnish with a back:to back a book.", "to lie at the back of; form a back or background for:a beach backed by hills.", "to provide with an accompaniment:a singer backed by piano and bass.", "to get upon the back of; mount .", "to write or print on the back of; endorse ; countersign .", "Carpentry.to attach strips of wood to the upper edge of (a joist or rafter) to bring it to a desired level.", "Nautical.to alter the position of (a sail) so that the wind will strike the forward face.to brace (yards) in backing a sail.to reinforce the hold of (an anchor) by means of a smaller one attached to it and dropped farther away.", "to alter the position of (a sail) so that the wind will strike the forward face.", "to brace (yards) in backing a sail.", "to reinforce the hold of (an anchor) by means of a smaller one attached to it and dropped farther away."]}, {"Bold_text": "verb (used without object)", "List Items": ["to go or move backward (often followed byup).Synonyms: withdraw , retreat , retire", "Nautical.(of wind) to change direction counterclockwise ( veer )."]}, {"Bold_text": "adjective", "List Items": ["situated at or in the rear:at the back door;back fence.Antonyms: front", "far away or removed from the front or main area, position, or rank; remote :back settlements.", "belonging to the past:back files;back issues.", "in arrears; overdue :back pay.", "coming or going back; moving backward:back current.", "Navigation. reciprocal(def7) reciprocal(def7).", "Phonetics.(of a speech sound) produced with the tongue articulating in the back part of the mouth, as in either of the sounds ofgo."]}, {"Bold_text": "verb phrase", "List Items": ["to abandon an argument, opinion, or claim; withdraw; retreat:He backed down as soon as a member of the audience challenged his assertion.", "to retreat; withdraw:They gradually began to back away from their earlier opinion.", "to back down:Now that the time for action had arrived, it was too late to back off.Textiles.to reverse (the spindle) in mule spinning prior to winding on the newly spun length of yarn.", "to back down:Now that the time for action had arrived, it was too late to back off.", "Textiles.to reverse (the spindle) in mule spinning prior to winding on the newly spun length of yarn.", "to bring (a stream of traffic) to a standstill:A stalled car backed up traffic for miles.Printing.to print a sheet again on its other side.Printing.to fill in (the thin copper shell of an electrotype) with metal in order to strengthen it.to move backward:Back up into the garage.to reinforce:We backed up the cardboard with slats so it wouldn't fall down.to support or confirm:He backed up my story and they let us go.Computers.to duplicate (a file or a program) as a precaution against failure.", "to bring (a stream of traffic) to a standstill:A stalled car backed up traffic for miles.", "Printing.to print a sheet again on its other side.", "Printing.to fill in (the thin copper shell of an electrotype) with metal in order to strengthen it.", "to move backward:Back up into the garage.", "to reinforce:We backed up the cardboard with slats so it wouldn't fall down.", "to support or confirm:He backed up my story and they let us go.", "Computers.to duplicate (a file or a program) as a precaution against failure.", "to fail to keep an engagement or promise; withdraw from; abandon:You can't back out now.Two entrants have backed out of competing in the marathon.You can't back out now.", "Australian Informal.to return for more of, as another helping of food."]}, {"Bold_text": "adverb", "List Items": ["at, to, or toward the rear; backward :to step back.", "in or toward the past:to look back on one's youth; They met in Chicago back in 1976.", "at or toward the original starting point, place, or condition:to go back to the old neighborhood.", "in direct payment or return:to pay back a loan; to answer back.", "in a state of restraint or retention:to hold back the tears; to hold back salary.", "in a reclining position:to lean back; to lie back."]}, {"Bold_text": "verb phrase", "List Items": ["to be treacherous or faithless to; betray :to go back on friends.to fail to keep; renege on:to go back on promises.", "to be treacherous or faithless to; betray :to go back on friends.", "to fail to keep; renege on:to go back on promises."]}, {"Bold_text": "noun", "List Items": ["a large tub, vat, or cistern used by dyers, brewers, distillers, etc., to hold liquids.", "a broad-beamed ferryboat hauled across a body of water by a rope or chain."]}]