1. the state of not having information, understanding, or awareness about something
His lack of knowledge about the subject became evident during the discussion.
A sua falta de conhecimento sobre o assunto tornou-se evidente durante a discussão.
2. absence of education or expertise in a particular area
The lack of knowledge among the team members hindered the project's progress.
A falta de conhecimento entre os membros da equipa prejudicou o progresso do projecto.