To imprison somebody, usually without trial.
The US government interned thousands of Japanese-Americans during World War II.
To internalize.
To work as an intern. Usually with little or no pay or other legal prerogatives of employment, for the purpose of furthering a program of education.
I'll be interning at Universal Studios this summer.
Practice of always using references instead of copies of equal objects.
In computer programming, the practice of using always references in place of copies of equal objects is known as interning.