<language> A family of systems from SoftVelocity, Inc. for building database applications on Microsoft Windows. Clarion products include Clarion 4GL language with a C++ and Modula-2 compiler. Clarion products support fast, efficient database application development. Clarion was originally developed by Clarion Software Corporation, later to become TopSpeed Corporation. In 2000, the Clarion product line was acquired by SoftVelocity Inc.