Open English Wordnet
Nouns
(n)back, dorsumthe posterior part of a human (or animal) body from the neck to the end of the spine“his back was nicely tanned” (n)rear, backthe side that goes last or is not normally seen“he wrote the date on the back of the photograph” (n)back, rearthe part of something that is furthest from the normal viewer“he stood at the back of the stage”,
“it was hidden in the rear of the store” (n)back(football) a person who plays in the backfield (n)backthe part of a garment that covers the back of your body“they pinned a ‘kick me’ sign on his back” (n)back, backresta support that you can lean against while sitting“the back of the dental chair was adjustable” (n)back(American football) the position of a player on a football team who is stationed behind the line of scrimmage Verbs
(v)backtravel backward“back into the driveway”,
“The car backed up and hit the tree” (v)second1, back, endorse, indorsegive support or one's approval to“I'll second that motion”,
“I can't back this plan”,
“endorse a new project” (v)backcause to travel backward“back the car into the parking spot” (v)backsupport financial backing for“back this enterprise” (v)backbe in back of“My garage backs their yard” (v)backshift to a counterclockwise direction“the wind backed” (v)back, back upestablish as valid or genuine“Can you back up your claims?” (v)backstrengthen by providing with a back or backing Adjectives
(a)backrelated to or located at the back“the back yard”,
“the back entrance” (s)back, hind, hinderlocated at or near the back of an animal“back (or hind) legs”,
“the hinder part of a carcass” (s)backof an earlier date“back issues of the magazine” Adverbs
(r)backin or to or toward a former location“she went back to her parents' house” (r)backin or to or toward an original condition“he went back to sleep” (r)back, backwardin or to or toward a past time“set the clocks back an hour”,
“never look back”,
“lovers of the past looking fondly backward” (r)backin reply“he wrote back three days later” (r)backin repayment or retaliation“we paid back everything we had borrowed”,
“he hit me and I hit him back”,
“I was kept in after school for talking back to the teacher”