Yes my opinion on the definition of Heavy Metal has been listened to! Well I guess this isn't really unrelated so I will post it here- the generic (wikipedia/iTunes/other sites) defenition of the genres you posted. Just to clarify.
Heavy Metal- developed- 1960s /1970s
definition- thick, massive sound, characterized by highly amplified distortion and extended guitar solos. Allmusic states that "of all rock & roll's myriad forms, heavy metal is the most extreme in terms of volume, machismo, and theatricality."
examples- Led Zeppelin, Black Sabbath, and Deep Purple, Aerosmith
Classic Rockdeveloped- 1950s/early 1960s
definition- umm i guess its kinda a sub category of rock... but i suppose its more of an era than a genre
examples- Eagles, Beatles, Kansas
Hardcore Metaldeveloped- late '90s/ early '00s
definition- (mostly from wikipedia) melodic, emphasizes breakdowns, and sometimes discards the conceptual trappings of both its parent genres, (punk/metal)
examples- AILD, Killswitch, Biohazard
'Rock'developed- uhhhhh well
definition- this pretty much encompasses the other genres you threw out... but... "popular music with a prominent vocal melody, (sometimes) accompanied by guitar, drums, and bass.
examples- the list goes on
Blues developed- 1910s/20's
definition- another big one, since it was the founder of rock, but here goes. Uses blues/pentatonic scale with vocal melody and instrumental accompaniment. Not much, huh?
examples- Muddy Waters, BB King, Les Paul
The other stuff is self explanatory. Wow that took a long time.