What does "longstanding" mean?

Alternative form of long-standing.

Longstanding

Common synonyms include: agelong, ancient writing tablet, chronic disorder, cultural stabilities, deep roots, endured.

adj

adj ·3 syllables ·Rare ·Advanced level

Adjective

1
Alternative form of long-standing. alt-of, alternative
"Independent developers began airing longstanding grievances, skeletons in the closet, and as-told-tos about Microsoft tactics over the years."

Adjective

"We recognize your longstanding service to the community."