Bachelor's degree
A bachelor's degree (from Middle Latin "baccalaureus") or baccalaureate (from Modern Latin "baccalaureatus") is an undergraduate academic degree awarded by colleges and universities upon completion of a course of study lasting three to seven years (depending on institution and academic discipline). In some institutions and educational systems, some bachelor's degrees can only be taken as graduate or postgraduate degrees after a first degree has been completed. In countries with qualifications frameworks, bachelor's degrees are normally one of the major levels in the framework (sometimes two levels where non-honours and honours bachelor's degrees are considered separately), although some qualifications titled bachelor's degrees may be at other levels (e.g. MBBS) and some qualifications with non-bachelor's titles may be classified as bachelor's degrees (e.g. the Scottish MA and Canadian MD).
Minor (academic)
While academic minors are usually associated with undergraduate degrees as a student's secondary focus, academic minors also exist at the graduate level, particularly in U.S. institutions. Sometimes this can refer to a student's minor or secondary field within their discipline, such as a Political Science PhD student pursuing a major field in American Politics and a minor field in Political Theory, or a Religious Studies PhD student pursuing a major field in Theology and a minor field in History of Religion. 
However, as in undergraduate courses of study, outside graduate study minors also exist at many universities - sometimes officially and sometimes unofficially. For example, at Oregon State University, Master's and PhD students are able to pursue an official graduate minor in addition to the discipline of their degree. At Florida State University, graduate minors exist on an unofficial basis on the grounds that a Master's or Doctoral student takes at least 9 and at most 18 credit hours in a secondary field outside of his or her academic discipline.
Typically, an outside minor at the maximum allowed credit hours or quarter credit units (typically 18 credit hours in many public universities, or 24 credit units at others) fulfills a qualifying requirement to teach the discipline as an adjunct at a community college or state college, and the research experience and connections from an outside minor can also be tailored toward pursuing a non-academic career related to the minor field. 
Some PhD students, pursuing an outside graduate minor, choose to integrate the minor field into their dissertation with a scholar from their minor field serving as an outside committee member on their dissertation.