2. Adjective. (abbreviation of acting) ¹
3. Adjective. (grammar) (abbreviation of active) ¹
4. Adjective. (abbreviation of actual) ¹
5. Noun. (context: plural) (abbreviation of activities) ¹
6. Noun. (context: singular) (abbreviation of actor) ¹
7. Noun. (context: singular) (abbreviation of actuary) ¹
¹ Source: wiktionary.com