Thanks for telling us, that's interesting!
Get ahead (it is written with no spaces) is a phrasal verb and it means "make progress". In English there are more than 500 phrasal verbs. Only a mother tangue teacher could know all of them including their all meanings.
And, as for online translators: if you need to find just a word or expression, try my favourite dictionary and language forum: http://www.wordreference.com/
Have a nice day