Meaning of -EE in English

-ee /iː/ BrE AmE suffix [in nouns]

[ Language: Anglo-French ; Origin: Latin -atus ]

1 . someone who is being treated in a particular way:

the payee (=someone who is paid)

a trainee

an employee

2 . someone who is in a particular state or who is doing something:

an absentee (=someone who is absent)

an escapee

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.