to complete (something) successfully, get (something) done
bring to successful conclusion; reach a goal
Cases of word usage
1) to achieve (the usual word) (attain)
2) to achieve what was wanted or hoped for (fruition)
3) (to threaten) to use force against those in control of (a plane etc) in order to achieve certain aims or to reach a desired destination (hijack)
4) the constant effort to achieve something (perseverance)
5) a place visited for pleasure or for health reasons; to make use of a method or means in order to achieve something, especially after failure (resort)
6) something (to be) aimed at when shooting etc; anything (an amount, extent etc) which one wants to achieve (target)
7) a person who fails to achieve the expected or possible standard or result (underachiever)