Use the long-press menu of a word to have your device's text-to-speech implementation speak it for you.
Note: I am not the original author, but I took over maintenance of it after being surprised by the removal of the original QuickDic app.
The original dictionary files got lost, all have been regenerated and are using a new, more compact format.
If you are missing dictionaries you rely on please request them. Also say if you spot any significant issues with the new dictionaries.
Source code is available here: https://github.com/rdoeffinger/Dictionary but little documentation (in the readme.txt) so far.
The adventurous can choose to get the beta version here if you want to follow development more closely: https://play.google.com/apps/testing/de.reimardoeffinger.quickdic