Please provide a Preference setting for the font used.

xfce4-dict uses the Default Font from Settings > Appearance (Fonts tab). This setting is used for most of the Desktop Environment (DE). It would be nice to be able to set the xfce4-dict font size independent of the System Default font. Thus, a user could choose the best / preferred font for each case. I would choose an easy-to-read font type & size for the dictionary but for the DE something that maintains its space proportions & beauty.