Meaning of LACK in English

LACK

I. verb

to be without something and especially something essential or greatly needed

the building lacks a fire escape

Synonyms: need, require, want

Contrasted words: enjoy, have, hold, own, possess

II. noun

1.

Synonyms: absence , dearth, default, defect, ||miss, privation, want

2.

Synonyms: failure 3, defalcation, deficiency, deficit, inadequacy, insufficience, insufficiency, scantiness, shortage, underage

Merriam Webster. Collegiate thesaurus English vocabulary.      Английский энциклопедический словарь тезаурус.