Definition of

counter
1.
counter for the ichi-ni-san counting system (usu. directly preceding the item being counted), noun read using its on-yomi(read as "ka")
See also:箇 (か)
2.
counter for articles(read as "ko")
See also:個 (こ)
particle
3.
indicates possessive (esp. in place names)(read as "ga")
See also:
Other readings: