1. Torah refers to the first part of the Hebrew Bible, the Pentateuch (five Books of Moses). The Torah lies at the heart of Jewish life and prayer. It is regularly experienced, read and heard (that’s why it is also called miqra–that which is read), interpreted, and revered by Jewish communities.
2. Torah refers to the Oral Torah, the Rabbinic idea that in addition to the written text of the Torah, Moses and all of Israel (past, present, and future) received an oral traditioin on Mt. Sinai. The Rabbis considered both to be the basic of basis for Jewish law (Halakha).
3. Torah refers to Jewsh tradition in general.