say it: DED-lahk
deadlock is a noun meaning "a situation in which no progress can be made or no advancement is possible". It carries one recorded sense.
a situation in which no progress can be made or no advancement is possible
“reached an impasse on the negotiations”
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 deadlock 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.