Denshi Jisho — Online Japanese dictionary

へいごう annexation; amalgamation; merger
Noun 
へいどん annexation; merger; swallowing up
Noun, Suru verb 

You can also

Look up kanji details for 并.

Try a Yahoo Jisho search for 并 .
Try a Goo Jisho search for 并 .
Try a Google search for 并 .