"Invisible but real barrier through which the next stage or level of advancement can be seen, but cannot be reached by a section of qualified and deserving employees. Such barriers exist due to implicit prejudice on the basis of age, ethnicity, political or religious affiliation, and/or sex."
"Since becoming commonplace in contemporary language it [glass ceiling] has become generally applied to obstacles encountered in any field and by any group"
> The metaphor was first coined by feminists in reference to barriers in the careers of high-achieving women.[0]
> "A glass ceiling" represents a barrier that prohibits women from advancing toward the top of a hierarchical corporation.[0]
[0] https://en.wikipedia.org/wiki/Glass_ceiling