noun
Baseball term for the second of the four bases, located between first and third base.
ランナーが二塁に進んだ。
The runner advanced to second base.
彼は二塁手として試合に出た。
He played in the game as a second baseman.
Compound of 二 (two) and 塁 (base, fortification). The kanji 塁 originally referred to a rampart or mound, later applied to baseball bases.