International and Worldwide - which is more definitive?

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Last Monday when I was at the Immigration Office at Level 6 at PWTC Building where you activate the Second Home Program, I was next to a MM2H agent who brought his client and they were having some kind of an "argument" with the officer. It is regarding the man's medical insurance.

He is from China and his insurance policy says that he has INTERNATIONAL coverage. The officer told him that it was not sufficient to convince him that the medical coverage includes Malaysia. His agent made the wrong move when he asked the Malay officer whether he understands what 'international' means. The officer could have blown his top for being taught English lesson in public but he kept his cool. He said that "WORLWIDE" is more acceptable and went to the extent of teaching the agent what WORLDWIDE means. Nevertheless, he said he can accept the medical policy if the applicant can get his insurance company to add "including Malaysia" in the policy. 

Since I was busybody, I suggested to the young man just go and buy a minimum basic local policy costing less than RM 400 and be done with it. It is not going to waste as an additional local policy will be useful should he be hospitalised. He agreed with me. He even commented that the one back home in China is a hassle to make claims even when he was in China let alone here in a strange land.

Coming back home, I did a online research and  found out the definition of both words. It looks like the immigration officer is right after all.  Anyone encounter this problem before?

INTERNATIONAL
1. between or among nations; involving two or more nations

2. of or pertaining to two or more nations

3. having members or activities in several nations

WORLDWIDE
1. extending or spread throughout the world

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An interesting post, ypchoon.  I went back to the insurance letter I submitted back in 2007 and sure enough it says "your benefits include hospital and/or medical services rendered worldwide".  MM2H accepted it without any problems.  I guess the competent insurance companies are aware of the distinction you make in your post...Jim, USA