1. the rear part of the human body from the neck to the bottom of the spine
2. the side or part of something that is away from the front

1. located at or near the rear

1. in return to a former place or condition
2. in or toward a former time

1. to support or help someone or something
2. to move backward or in reverse

Examples

• She hurt her back lifting heavy boxes.
• The back door was left unlocked.
• Please write your name on the back of the paper.
• He came back from vacation yesterday.
• I’ll be back in an hour.
• The company decided to back the new project.
• She backed the car out of the driveway.
• Looking back, I should have studied harder.