 Abbruchfragment | | | break |
| Abhängigkeitsbeziehung | | | dependency |
| Abschnitt | | | compartment |
| abstract | | | abstract |
| access | | | access |
| Aenderungsereignis | | | change event |
| Aggregation | | | aggregation |
| Akteur | | | actor |
| Aktion | | | action |
| Aktivität | | | activity |
| Aktivitätsbereich | | | activity partition |
| Aktivitätsbereich, hierarchischer | | | hierarchical activity partition |
| Aktivitätsbereich, mehrdimensionaler | | | multidimensional activity partition |
| Aktivitätsdiagramm | | | activity diagram |
| Alternatives Fragment | | | alternative |
| Andauernde Aktivität | | | DoActivity |
| Antwortnachricht | | | reply message |
| AnyTrigger | | | AnyTrigger |
| Artefakt | | | artifact |
| Assoziation | | | association |
| Assoziationsklasse | | | association class |
| Assoziationsrolle | | | association role |
| Assoziation, abgeleitete | | | derived association |
| Assoziation, bidirektionale | | | bidirectional association |
| Assoziation, binäre | | | binary association |
| Assoziation, unidirektionale | | | unidirectional association |
| Assoziation, zirkuläre | | | circular association |
| Attribut | | | attribute |
| Attributwert | | | attribute value |
| Attribut, abgeleitetes | | | attribute, derived |
| Attribut, optionales | | | attribute, optional |
| Attribut, statisches | | | attribute, static |
| Aufrufereignis | | | call event |
| Ausführungssequenz | | | execution specification |
| Ausführungsumgebung | | | execution environment |
| Ausgabeparameter | | | output parameter |
| Ausprägung | | | instance |
| Austrittsaktivität | | | exit behavior |
| Austrittspunkt | | | exit point |
| auxiliary | | | auxiliary |