You have to type.
If you want it for the HD screen, there's two other devices that have them; the wexler flex one (unbreakable compared to glass substrate screens, but I don't like the shape/flabbiness of the device really), and the Onyx i62HD (touchscreen, have to be careful about it as there is also a non-hd version around which also goes by i62).
Maybe one of them suits your dictionary needs better. But I don't have personal experience with either device.
Mioght be worth waiting a bit, there could be more highres ereaders in the future.