1 Peter 4:15 – Meddling – allotriepiskopos, lit. “overseer of the affairs of another,” In a sinlist with murder, thief, criminal.
Other English definitions – to interest oneself in what is not one’s concern : interfere without right or propriety
The actual act of meddling also means that the meddler is not a neutral party. Typically the meddler gets involved without understanding the whole picture. The meddler tries to portray themselves as a nice person who is “just trying to help” while they, in fact, make things much worse.
Mediation is different than meddling.
Websters 18:28 – 1. To have to do; to take part; to interpose and act in the concerns of others, or in affairs in which one’s interposition is not necessary; often with the sense of intrusion or officiousness.