Meaning ofstand upin English

Verb

1. to rise from sitting
   She slowly began to stand up from her chair.
   Synonyms:

   get uprisearisestandrise up
   Antonyms:

   sit downremain seatedstay seatedbe seatedsit
2. to miss a planned meeting; abandon someone
   The company will stand up for the rights of its employees.
   Synonyms:

   ditchleavedesertabandonflake on
   Antonyms:

   show upattendkeepmeetappear
3. to speak out; make voice heard
   Unfortunately, he had to stand up his date at the last minute.
   Synonyms:

   speak outspeak upvoiceexpressarticulateassertproclaim
   Antonyms:

   keep quietremain silentbe mutehold backstay mum
4. to serve as a role in a wedding
   The best man will stand up as a witness at the wedding ceremony.
   Synonyms:

   be a groomsmanbe a bridesmaidbe a best manbe a maid of honorserve as an attendant
   Antonyms:

   declinerefuseopt outwithdrawresign
5. to endure or last over time; remain valid
   The theory will stand up to scrutiny and criticism.
6. to remain believable or plausible (in a story, etc.)
   The alibi did not stand up to further investigation and was proved false.