What does "paywall" mean?

A system that restricts access to content with a purchase or a paid subscription.

What is a synonym for "paywall"?

Common synonyms include: access barrier, access control, barrier, block, content blocking, exclude.

/ˈpeɪ.wɔːl/ noun, verb, slang

noun, verb, slang ·Moderate ·High school level

Noun

1
A system that restricts access to content with a purchase or a paid subscription. informal
"The premium content on this website is behind a paywall."
2
A mechanism used to limit access to only paying users wordnet

Verb

1
To restrict access to (a website or other resource) by means of a paywall. informal, transitive

"I can't read the article because of the paywall."

From pay + wall, by analogy with firewall.