Definition of "grep"

grep

/ɡɹɛp/

proper noun
1. A program which selects lines in a file which match a given pattern.
verb
third-person singular simple present greps, present participle grepping, simple past and past participle grepped
1. (computing) To use a program such as grep to search in a file.
  Quotations
  Running netstat and grepping for sshd will give a similar output to this: […]
  2019, Kamesh Ganesan, Rithin Skaria, Frederik Vos, Hands-On Linux Administration on Azure […] , 2nd edition, Packt Publishing Ltd, page 293
2. (by extension) To search anything (perhaps a paper document by eye).