| offener Brief | open letter |
| offene Frage | moot point |
| offene Linie | open file |
| offene Spiele | Open Game |
| offener Fonds | open-end fund |
| offener Kern | interior |
| offenes Buch | open book |
| offenes Ende | cliffhanger |
| blauer Brief | pink slip |
| Epheserbrief | Ephesians Epistle to the Ephesians |
| Leserbrief | reader letter reader's letter readers letter |
| Offenes Mikro | open mic |
| Offertorium | offertory |
| offen zeigen | flaunt |
| offene Menge | open set |
| offene Silbe | open syllable |
| offenbaren | bare disclose reveal |
| offenherzig | frank candid open revealing |
| offerieren | offer |
| affiner Raum | affine space |