say it: bi-LAW-nging
belonging is a noun meaning "happiness felt in a secure relationship". It carries one recorded sense.
happiness felt in a secure relationship
“with his classmates he felt a sense of belonging”
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 belonging 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.