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According to WordNet, the verb "back_up" has 5 sense(s).
201478603 become or cause to become obstructed; "The leaves clog our drains in the Fall"; "The water pipe is backed up".
201997680 move backwards from a certain position; "The bully had to back down".
202556126 give moral or psychological support, aid, or courage to; "She supported him during the illness"; "Her children always backed her up".
200223109 establish as valid or genuine; "Can you back up your claims?".
- SUMO Mappings: Putting (subsuming mapping)
201694620 make a copy of (a computer file) especially for storage in another place as a security copy; "You'd better back up these files!".
- SUMO Mappings: Process (subsuming mapping)
- SUMO Mappings: Creation (subsuming mapping)
Explore the word back_up on the WordNet web site.
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