Critical or Critically may refer to:Critical thinking, analysis of facts to form a judgment Critical, or critical but stable, medical states Critical, or intensive care medicine Critical juncture, a discontinuous change studied in the social sciences. Critical Software, a company specializing in mission and business critical information systems Critical theory, a school of thought that critiques society and culture by applying knowledge from the social sciences and the humanities Critically endangered, a risk status for wild species Criticality (status), the condition of sustaining a nuclear chain reaction