say it: AW-lowt
all-out is an adjective meaning "using all available resources". It carries one recorded sense.
using all available resources
“all-out war”
“a full-scale campaign against nuclear power plants”
Definitions, synonyms and semantic relations for all-out 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.