(noun, adjective, verb)


1. (typography) Not part of the usual font character set; especially, non-Roman type or symbols as opposed to standard alphanumeric Roman type.

- In computing, pi characters are entered with special combinations of keys like ctrl-alt-x, or via character sequences such as {.


1. the ratio of the circumference to the diameter of a circle; approximately equal to 3.14159265358979323846...

Definition categories: quantity

2. someone who can be employed as a detective to collect information

Similar word(s): operative, shamus, sherlock

Definition categories: person, detective

3. the scientist in charge of an experiment or research project

Definition categories: person, scientist

4. the 16th letter of the Greek alphabet

Definition categories: communication, letter

5. an antiviral drug used against HIV; interrupts HIV replication by binding and blocking HIV protease; often used in combination with other drugs

Definition categories: man–made, antiviral


1. (letterpress typography) To spill or mix printing type. Also, "to pie".