1A subject taught in school, such as math or English.
好きな学科は何ですか。
What is your favorite subject?
高校では理系の学科を選択した。
In high school, I chose science subjects.
苦手な学科を克服するために毎日勉強している。
I study every day to overcome the subjects I'm weak at.
2A department within a university, organized by field of specialization.
兄は工学部の機械工学科を卒業した。
My older brother graduated from the mechanical engineering department of the faculty of engineering.
どの学科に進むかまだ決めていない。
I haven't decided which department to go into yet.
その大学には人気の学科がいくつかある。
That university has several popular departments.