giant octopus

Noun

 * 1) A mythical or fictional large sea creature with features of an octopus
 * 2)   Norse sea monster
 * 3)   Lovecraftian horror monster
 * 4) One of certain large sea creatures of the order Octopoda
 * 5)  spp.
 * 6) especially,  (giant Pacific octopus)
 * 1) especially,  (giant Pacific octopus)

Coordinate terms

 * giant squid