say it: kuhm-PLEE-ting
completing is an adjective meaning "acting as or providing a complement (something that completes the whole)". It carries one recorded sense.
acting as or providing a complement (something that completes the whole)
Definitions, synonyms and semantic relations for completing 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.