1. in a way that is extremely careful and thorough, paying great attention to details
2. in a way that is morally correct and honest, following ethical principles exactly

Examples

• She scrupulously followed all the safety procedures.
• The accountant scrupulously recorded every transaction.
• He scrupulously avoided any conflict of interest.
• The researcher scrupulously documented all her findings.
• They scrupulously maintained their neutrality in the dispute.
• The judge scrupulously reviewed all the evidence.
• She scrupulously cleaned every surface in the laboratory.