1. to integrate a new employee into an organization by providing training, orientation, and resources
Usage: business/HR context; third-person singular present tense or plural form
2. to bring a new customer, client, or user into a service or platform
Usage: business/technology context; third-person singular present tense or plural form

Examples

• The company onboards new hires during the first week of employment.
• Our HR department onboards about fifty employees each quarter.
• The software platform onboards users through an interactive tutorial.
• She onboards clients by walking them through the account setup process.
• The team onboards fresh talent with a comprehensive orientation program.
• The bank onboards new customers with identity verification and account activation.