1HBPa small seed from a fruit such as an apple or orange:
an apple pip
Have these oranges got pips in?
2a high note that is part of a series of short sounds, used for example on the radio to show the time, or on a public telephone line to show that your money has almost finished [= beep American English]
The pips are going so I'd better say goodbye.
3old-fashionedPMAone of the stars on the shoulders of the coats of army officers that shows their rank
Definition from the Longman Dictionary of Contemporary English Advanced Learner's Dictionary.