1. The state of not knowing or being unfamiliar with something; absence of information or understanding about a subject
His lack of knowledge about the project led to mistakes.
Sua falta de conhecimento sobre o projeto levou a erros.
2. Ignorance or unfamiliarity with a particular field, skill, or topic
The lack of knowledge in this area is a common problem.
A falta de conhecimento nesta área é um problema comum.