back
The part of your body behind your chest, from your neck to your waist.
The part of a person's body from the neck to the waist on the opposite side to the chest.
To go to a place where you were before.
Toward a place, position, or condition where someone or something was before.
To say or show that you support someone or something.
To give support, approval, or help to someone or something.
The part of something that is behind or opposite from the front.
The surface or side of something that is opposite its front.
To move a car or other thing backwards.
To cause a vehicle or object to move backwards.
- Base: back
- Plural: back, backs
- Base: back
- 3rd Person Singular: backs
- Present Participle: backing
- Past: backed
back and forth
1repeated movement in two directions
Moving first one way and then the other way again and again.
- The children ran back and forth across the yard.
- We talked back and forth for hours.
back and forth
1repeatedly in opposite directions
from one side to the other many times
- The kids ran back and forth across the yard.
- We went back and forth by email for a week.
- She rocked back and forth in her chair.
- The bus goes back and forth all day.
back in the day
1in the past, nostalgically remembered time
Talking about a time in the past that you remember fondly.
- Back in the day, we didn’t have smartphones.
- He often talks about how things were better back in the day.
back up
1copy data, reverse, or support claim/person
To make a copy of data, move backwards, or give support for what someone says or does.
- Remember to back up your files regularly.
- The truck backed up slowly into the alley.
- She backed up her argument with facts.
behind someone's back
1without someone's knowledge, secretly and unfairly
To do something without someone knowing, often something bad or dishonest.
- They made fun of him behind his back.
- She was angry that they had planned it behind her back.
get off my back
1stop bothering or criticizing me
Stop telling me what to do or criticizing me all the time.
- I’ll do it later, so get off my back!
- He told his boss to get off his back about deadlines.