To obtain something means to get it or achieve it.
He was trying to obtain a false passport.
They've obtained [= acquired] the necessary permission to enter.
These ideas no longer obtain for our generation.
The drug is legally obtainable in this country.
Both can mean to get or to acquire, and in some situations can be used synonymously, but one or the other might be more appropriate depending on what is being acquired and how.
To come into possession of;
Get, acquire, or procure, as through an effort or by a request.
See examples of obtain used in a sentence.
Definition of obtain verb in oxford advanced learner's dictionary.
Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.
To get something, especially by asking for it, buying it, working for it, or producing it from.
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To succeed in gaining possession of as the result of planning or endeavor;