back (Noun) — The posterior part of a human (or animal) body from the neck to the end of the spine. ex. "his back was nicely tanned"
back (Noun) — The side that goes last or is not normally seen. ex. "he wrote the date on the back of the photograph"
back (Noun) — The part of something that is furthest from the normal viewer. ex. "he stood at the back of the stage"
back (Noun) — (football) a person who plays in the backfield.
back (Noun) — The series of vertebrae forming the axis of the skeleton and protecting the spinal cord. ex. "the fall broke his back"
back (Noun) — The protective covering on the front, back, and spine of a book.
back (Noun) — The part of a garment that covers the back of your body. ex. "they pinned a 'kick me' sign on his back"
back (Noun) — A support that you can lean against while sitting. ex. "the back of the dental chair was adjustable"
back (Noun) — (American football) the position of a player on a football team who is stationed behind the line of scrimmage.
back (Verb) — Pick one person to give support and approval to in a particular role. ex. "I backed Kennedy in 1960"
back (Verb) — Travel backward. ex. "back into the driveway" ex. "The car backed up and hit the tree"
back (Verb) — Give support or one's approval to. ex. "I can't back this plan"
back (Verb) — Cause to travel backward. ex. "back the car into the parking spot"
back (Verb) — Support financial backing for. ex. "back this enterprise"
back (Verb) — Be in back of. ex. "My garage backs their yard"
back (Verb) — Place a bet on. ex. "Which horse are you backing?"
back (Verb) — Shift to a counterclockwise direction. ex. "the wind backed"
back (Verb) — Establish as valid or genuine. ex. "Can you back up your claims?"
back (Verb) — Strengthen by providing with a back or backing.
back (Adjective) — Related to or located at the back. ex. "the back yard" ex. "the back entrance"
back (Adjective) — Located at or near the back of an animal. ex. "back legs"
back (Adjective) — Of an earlier date. ex. "back issues of the magazine"
back (Adjective) — Far from the main area or way. ex. "she knows a back route"
back (Adverb) — In, to or toward a former location. ex. "she went back to her parents' house"
back (Adverb) — At or to or toward the back or rear. ex. "he moved back"
back (Adverb) — In, to or toward an original condition. ex. "he went back to sleep"
back (Adverb) — In, to or toward a past time. ex. "set the clocks back an hour" ex. "never look back"
back (Adverb) — In reply. ex. "he wrote back three days later"
back (Adverb) — In repayment or retaliation. ex. "we paid back everything we had borrowed" ex. "he hit me and I hit him back" ex. "I was kept in after school for talking back to the teacher"