"hack" on hackernews essentially means "I used my computer to do something". The overwhelming population of people here aren't security engineers, but rather developers.

I considered that, but the mentions of pwn2own and the bug bounty program have me thinking "hack" is used in the security/mainstream sense.

Hack as a term predates the concept of cyber security. It was originally "a quick and dirty solution that is clever"

https://en.wiktionary.org/wiki/hack

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