I. noun Date: 1607 one that peeps, eye , II. noun Date: circa 1611 one that makes a peeping sound, any of various tree frogs that peep shrilly
PEEPER
Meaning of PEEPER in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012