say it: LAHY-fluhs
lifeless is an adjective meaning "deprived of life; no longer living". It carries 4 recorded senses.
destitute or having been emptied of life or living beings
“after the dance the littered and lifeless ballroom echoed hollowly”
lacking animation or excitement or activity
“the party being dead we left early”
“it was a lifeless party until she arrived”
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 lifeless 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.