-ee

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. One that receives or benefits from a specified action: addressee.
2. n. One that possesses a specified thing: mortgagee.
3. n. One that performs a specified action: absentee.
4. n. One resembling: goatee.
5. n. A particular, especially a diminutive kind of: bootee.
6. n. One connected with: bargee.

Wiktionary

1. n. Added to verbs to form words meaning a person or thing that is the object of that verb (ie, to whom or to which an action is done).
2. n. Less commonly added to verbs to form words meaning a person or thing that is the subject of that verb (ie, who or that does an action), especially where a passive sense of the verb is implied.
3. n. law Used to form words meaning a person who is the other party to a contract involving a person described by the corresponding word ending in -or
4. n. medicine Used to form words meaning a person who has undergone a particular medical procedure
5. n. Irregularly added to nouns to mean a person somehow associated with the object denoted by the noun.
6. n. Used to form diminutives.

GNU Webster's 1913

1. A suffix used, chiefly in law terms, in a passive signification, to indicate the direct or indirect object of an action, or the one to whom an act is done or on whom a right is conferred; as in assignee, donee, alienee, grantee, etc. It is correlative to -or, the agent or doer.