The bottom of the ocean.
The word you are looking for is "trench." Trenches are long and narrow depressions in the seafloor characterized by very steep sides.
The definition of something describes exactly what the word is and how the word can be used. You will also see synonyms for the word and if the word is a noun or adjective when viewing the definition.
The dictionary definition of a word
what is the definition of word-processing package
The seafloor spreading definition is the geologic process that occurs at the boundary between 2 plates where molten material within the earth pushes its way up, causing the plates to move away from each other. At these divergent boundaries molten material cools and hardens, creating new oceanic crust or seafloor
a definition of a compound word is jack-ass.
The word that goes with that definition is "door."
The definition of the word cited is quote as evidence for or justification of an argument or statement. Another definition for the word cited is mention as an example.
The word Lululemon Athletica has a definition. The word (words) have no definition, but instead are a name of a yoga athletic gear. The word Lulemon Athletica has no definition.
The connotation of a word is its literal dictionary definition. The denotation of a word is its inferred meaning.
That word has no definition in English.
When a word suggests something beyond its definition it is a connotation.