1.verbTo imprison somebody, usually without trial.
"The US government interned thousands of Japanese-Americans during World War II."
2.verbTo internalize.
3.verbTo 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."
4.nounPractice 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."