adj.appointed for life and not subject to dismissal except for a grave crime

"a tenured professor"

Do Tenured and Tenure-Track Faculty Matter?
Tenured Radicals: How Politics Has Corrupted Our Higher Education
Tenured Radicals: How Politics Has Corrupted Our Higher Education.
Does the aging of tenured academic staff affect the research performance of universities?
The Tenured 'Core' and the Tenuous 'Periphery': The casualisation of academic work in Australian universities
Professing to Learn: Creating Tenured Lives and Careers in the American Research University.
Profiling the research productivity of tenured information systems faculty at U.S. Institutions
Profiling the research productivity of tenured information systems faculty at U.S. Institutions
Mitochondrial regulation of cell cycle progression during development as revealed by the tenured mutation in Drosophila.
Examining the Influences on Faculty Departure Intentions: A Comparison of Tenured versus Nontenured Faculty at Research Universities...