For example, adjuncts are non-tenure-track faculty in the U.S. and in Canada. In Canada in particular, adjunct professors are often nominated in recognition of active involvement with the appointing institution, while they are employed by government, industry, a profession or another institution. Unlike in the US, if the appointment is strictly to teach one or more courses, the Course Lecturer appointment is used instead.
The number of adjunct professors in higher education in the United States has increased sharply since the 1970s. In 1975, adjuncts represented roughly 24% of instructional staff at degree-granting institutions, whereas in 2011 they represented over 40% of instructional staff.
In contrast, a similar designation, Professor adjunto, does imply stable full-time employment in countries such as Argentina and Brazil.
In parts of Spain, Profesor Adjunto is a non-tenured position. There exist similar Adjunktus in Hungary. In Thailand, Adjunct (Assistant/Associate) Professors are considered "non-regular officers".