what's the meaning of 'commit one's country'

Question

Since he was not given plenipotentiary poweres by his government, he could not commit his country without consulting his superiors.

According to the dictionary,

a word 'commit' has many meanings like the below.

1.to give in trust or charge; consign.

2.to consign for preservation:

3.to pledge (oneself) to a position on an issue or question

4.to bind or obligate, as by pledge or assurance; pledge:

5.to entrust, especially for safekeeping; commend:

6.to do; perform; perpetrate:

7.to consign to custody

I'm not sure which one suits in the sentence I quoted.

I guess 6 is correct.

Does 'commit one's country' mean 'manage one's country'?

Answer 1

Commit in the sentence means:

obligate, bind: a contract committing the company to complete the project on time

Usage of commit one's country is well explained in the link. It means to bind his country to do something with the presidential or its equivalent authority or power.

While Azerbaijan has in the past rejected EAU membership, Armenia—already heavily dependent on aid from Russia—is in a weaker position and has Russian troops stationed on its soil. Its President, Serge Sargsyan, has committed his country to join the Customs Union, the precursor to the Eurasian Union, while suspending the Associate Membership agreement with the EU that Armenia negotiated for three years.

Answer 2

It’s 4) bind or obligate.

It's saying he wasn’t allowed to promise his country would do something without making sure his superiors were okay with it.