back — Parts of the Body back /bæk/ noun CEFR A1 The part of your body from your neck to the bottom of your spine. “My back hurts after sitting all day.” Related words in this scene walknailrunjumptallbodyarmleghandfootshoulderfingerthumbtoekneeelbowwristankleneckcheststomachhipskinboneholdstrongshortpalmheelwaistthighfist Practice this word Create worksheet