What does "reality check" mean?

A check or review to make sure something is consistent, reasonable, etc.

What is a synonym for "reality check"?

Common synonyms include: disillusion, disillusions, smack into expectations, sobering.

noun

noun ·Rare ·Advanced level

Noun

1
A check or review to make sure something is consistent, reasonable, etc.
"Near-synonyms: sanity check, sanity test; sniff test"
2
an occasion on which one is reminded of the nature of things in the real world wordnet
3
A wake-up call; a reminder. idiomatic
"That kid needs a reality check before he fails or drops out."

"Near-synonyms: sanity check, sanity test; sniff test"