say it: kuh-nek-TIV-i-tee
connectivity is a noun meaning "the property of being connected or the degree to which something has connections". It carries one recorded sense.
the property of being connected or the degree to which something has connections
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for connectivity come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.