Meaning ofstack upin English

Verb

1. to compare or measure against something
   The company's sales don't stack up against their competitors.
   Synonyms:

   measure uphold upstand upcompare tomatch up
   Antonyms:

   differ fromdeviate fromfall short of
2. to accumulate; pile up
   The dirty laundry began to stack up in the hamper.
   Synonyms:

   accumulatepile upamassbuild upgather
   Antonyms:

   dwindledepletedispensedissipatescatter
3. to arrange in a pile
   The boxes were carefully arranged to stack up in the storage room.
   Synonyms:

   pile upheap upstackamassaccumulate
   Antonyms:

   scatterdispersedistributeseparateunstack