1 contemplate mentally, esp. in order to reach a conclusion.
2 examine the merits of (a course of action, a candidate, claim, etc.).
3 give attention to.
4 reckon with; take into account.
5 (foll. by that + clause) have the opinion.
6 (foll. by compl.) believe; regard as (consider it to be genuine; consider it settled).
7 (as considered adj.) formed after careful thought (a considered opinion).
Phrases and idioms:
all things considered taking everything into account.
Etymology: ME f. OF considerer f. L considerare examine
Useful english dictionary. 2012.