Meaning ofknock upin English

Verb

1. to hastily assemble or fabricate something
   The carpenter will knock up a shelf for the bookcase.
2. to impregnate someone (especially out of wedlock)
   The news reported that the celebrity got knocked up by her boyfriend.
3. to awaken or rouse someone; persuade to vote
   The campaign team tried to knock up support from local residents.
4. to gently hit a ball back and forth (as practice)
   The tennis players started to knock up the ball before the official match.