from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Alternative spelling of black hole, especially in the attributive.
- n. A place where traffic is silently discarded.
- n. A bit bucket; a place of permanent oblivion for data.
- n. DNSBL, used to block spamming IP addresses – are often called "blackhole lists"
- n. A blackhole server, a DNS server that handles reverse lookups of invalid IP ranges
- n. A resource sink.
black + hole (Wiktionary)