meta-definition
meta-definition on Hacker News
If you'd like, you can think of "meta" as short for "meta-strategy", with the distinction between "meta-strategy" and "strategy" as similar to the distinction to "meta-physics" and "physics". People who claim that "meta-physics" is just "physics" would probably be regarded as "pedants".
Here's a concrete example:
Soccer fundamentals: passing, dribbling, etc.
Soccer strategies: formation, player roles, etc.
Soccer meta: viable formations, player roles, etc.
No one is out there playing a 8-2-1 formation because it's not a viable strategy, i.e. it's not part of the current meta. The current meta in soccer is largely 4-4-2 and 4-4-3.
3 in the back is relatively rare, because it's weak to the player roles that we currently see being employed by competitors. It's not part of the meta because it's a weak strategy against the currently common strategies in the meta.