" chance upon "

1: to come upon face-to-face or as if face-to-face;

  * e.g., " ... chanced upon my archenemy as I rounded a corner "

•  Synonyms : 

•  catch,

•  encounter,

•  happen (upon),

•  meet,

•  stumble (upon)

•  Antonyms : 

• (N/A)

2: to come upon unexpectedly or by chance;

  * e.g., " ... I chanced upon your mother in the grocery store yesterday "

•  Synonyms : 

•  encounter,

•  find,

•  happen (on or upon),

•  hit (upon),

•  light (on or upon),

•  meet,

•  pitch (upon),

•  stumble (on or onto),

•  tumble (upon)

•  Antonyms : 

• (N/A)