1. Telephone services that allow callers to connect with others for conversation, typically on a specific topic or for social purposes.
Usage: Usually plural; often refers to commercial services; Informal
2. Online platforms or applications that enable real-time text-based messaging and conversation between multiple users.
Usage: Modern usage; often refers to digital communication channels

Examples

• Many teenagers used chatlines in the 1990s to meet new people.
• The company offers customer support through multiple chatlines.
• She joined several chatlines dedicated to book discussions.
• Modern chatlines are integrated into social media platforms.
• The chatlines were busy during the live event broadcast.
• He found a community through gaming chatlines.