back (EN)
adverb, adjective, noun, verb

adverb “back”

back
  1. returning to a previous state or location
    After the party, we all went back to my house to relax.
  2. in the opposite direction of the front or facing side
    When I called his name, he turned back to look at me.
  3. referring to a time in the past
    She looked back fondly on her childhood memories.
  4. maintaining a distance from something or someone
    Stay back from the edge of the cliff to avoid falling.
  5. far from the front or an edge
    He sits all the way back in the sofa.
  6. in a way that prevents progress
    His self-doubt is holding him back from applying for the job.
  7. reciprocally in exchange or response to a previous action
    When you smile at me, I always smile back.
  8. ago, earlier
    I visited that quaint village a couple of summers back.
  9. delayed to a later time
    The meeting was moved back an hour from 9 o'clock to 10 o'clock.

adjective “back”

back, non-gradable
  1. located at the rear
    She sat in the back seat of the car during the road trip.
  2. not current
    She was reading a back issue of the newspaper to catch up on old news.
  3. located away from main area
    We took a back road to the cottage.
  4. not paid when due
    He apologized for the back payments on his car loan, promising to settle the debt by next month.

noun “back”

sg. back, pl. backs or uncountable
  1. the rear part of the human torso
    After sitting for hours, she stretched and rubbed her aching back.
  2. the part of clothing that covers the rear of the torso
    She embroidered a beautiful pattern on the back of his jacket.
  3. the part of furniture that supports the human back
    The cat curled up against the chair's back.
  4. the furthest part from the front
    She stored her old photo albums at the very back of the closet, behind the boxes of shoes.
  5. the opposite side of the front or useful side of an object
    When you hang the picture frame, make sure the hook is on the back.
  6. the non-cutting side of a blade
    Use the back of the knife to gently squeeze the dough.
  7. the reverse side
    She wrote her phone number on the back of the business card.
  8. a position in team sports located behind most players
    During the rugby match, the coach yelled for the backs to get ready for a defensive play.
  9. a large container used in various industries
    After boiling the wort, the brewer transferred it to a large back to cool before fermentation.
  10. a boat used to transport people or goods across water
    We crossed the river on the back, which made regular trips between the two banks.

verb “back”

back; he backs; past backed, part. backed; ger. backing
  1. to move backwards
    When she realized she had forgotten her phone, she quickly backed out of the driveway to go get it.
  2. to give support to a person, cause, or idea
    My entire family backed my decision to study abroad.
  3. to endorse by signing the reverse side of a document
    Before mailing the contract, the manager backed it with his signature and company stamp.