intelligence department or intelligence service noun

A department of state or armed service for securing and interpreting information, esp about an enemy

intelligence quotient noun

The ratio, commonly expressed as a percentage, of a person's mental age to his or her chronological age (abbrev IQ)

intelligence test noun

A test by questions and tasks to determine a person's mental capacity, or the age at which his or her capacity would be normal

intelligent design noun

The creation of the universe by a rational agent, rather than by random processes

intelligent terminal noun (computing)

A terminal incorporating a microprocessor, capable of performing simple tasks independently of the larger computer to which it is connected