Definitions
There are 5 meanings of the phrase
Back Up.
Back Up - as a verb
Give moral or psychological support, aid, or courage to
Example: "She supported him during the illness"
Synonyms (Exact Relations)
support11Hypernyms (Closely Related)
Hyponyms (Broadly Related)
Move backwards from a certain position
Example: "The bully had to back down"
Synonyms (Exact Relations)
back downback offEstablish as valid or genuine
Example: "Can you back up your claims?"
Synonyms (Exact Relations)
back12Make a copy of (a computer file) especially for storage in another place as a security copy
Example: "You'd better back up these files!"
Example Sentences
"I need to make a back up of my important files."
"Her computer crashed and she lost all her data, so she had to restore it from a back up."
"The back up of the company's financial records is stored securely off-site."
"We should create a back up of this document before making any changes."
"I had to rely on the back up generator during the power outage."