 Kante | | | Activity Edge |
| Kante, gewichtete | | | weight edge |
| Kapselung | | | encapsulation |
| Klasse | | | class |
| Klassenattribut | | | class scope attribute |
| Klassendiagramm | | | class diagram |
| Klassenoperation | | | class scope operation |
| Klasse, abstrakte | | | class, abstract |
| Klasse, anonyme | | | class, anonymous |
| Klasse, eingebettete | | | class, nested |
| Klasse, parametrisierte | | | template class |
| Knoten | | | node |
| Knoten, strukturierter | | | structured activity node |
| Kollaboration | | | collaboration use |
| Kollaborationsdiagramm | | | collaboration diagram |
| Kollaborationstyp | | | collaboration |
| Kollaborationstyp, parametrisierter | | | parameterized collaboration |
| Kombiniertes Fragment | | | combined fragment |
| Kommentar | | | comment |
| Kommunikation | | | communication |
| Kommunikationsdiagramm | | | communication diagram |
| Kommunikationsmodell | | | communication model |
| Kommunikationspartner | | | communication partner |
| Kommunikationspfad | | | communication path |
| Kommunikation, asynchrone | | | asynchronous communication |
| Kommunikation, synchrone | | | synchronous communication |
| Komponente | | | component |
| Komponentendiagramm | | | component diagram |
| Komponente, komplexe | | | complex component |
| Komposition | | | composition |