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1.
Hivemind is when two or more people come to the same thought at the same time because of the same circumstances but do not know each other beforehand (i.e. it cannot be an inside joke). This usually happens on internet message boards, and is especially noticeable when the thought reached is not a meme. The name is reflective of insects who act in unison with their hive (or nest) mates.
Poster 1: *Random picture*
Poster 2: Holy shit, that looks just like my mom!
Poster 3: omg, that looks just like my mom
Poster 4: I'd like to meet your mom. Also, hivemind.
by AppleAceFaced October 05, 2007
 
2.
An enormous, single, intelligent entity made up of many smaller minds.

Also used disparagingly by outsiders to describe gullible members of any group who think alike (cf. pod people.
Are you hangin' with the sophs?

Nah, they're so totally a hive mind
by Dr. Haywood Floyd September 03, 2004
 
3.
1. A group of people who act or think in unison as if they are all the same individual.

2. A group of people who think the same thoughts as and/or carries out the objectives of either one Leader or each other.
1. Is it just me or are the guys in a hivemind unable to think for themselves?

2. I feel sorry for the poor saps in the hivemind, they are like pawns in a game of chess, only moving when commanded.
by IdiotOfAmerica August 04, 2010
 
4.
The name of your social/internet crowd that helps you solve any problem.
Post this to your Facebook/Twitter/Reddit:

"
Hivemind, I'm going snowboarding next month - what equipment do I need?
"
by ripper234 December 30, 2011
 
5.
Slang word for the internet
"Dude, is your wireless working? I need to check the Hivemind for this recipe for pot brownies
by slothhman April 17, 2009