Meaning ofstumble uponin English

Verb

1. to find something unexpectedly; by accident
   While researching, I stumbled upon an interesting article.
   Synonyms:

   come acrosschance uponhappen upondiscoverfindencountermeet withlight upon
   Antonyms:

   plan forintend toaim forseek outdeliberately find
2. to encounter someone by chance; unexpectedly meet
   At the party, she stumbled upon her old friend from college.
   Synonyms:

   come acrossrun intobump intochance uponhappen uponmeet by chanceencounter
   Antonyms:

   plan to meetarrange to meetintentionally meetdeliberately encounterschedule a meeting