Flight is general term for "unassisted" motion through air. By unassisted I mean no support structure from surface. So even a ball through up in air is technic

Flight is general term for "unassisted" motion through air. By unassisted I mean no support structure from surface. So even a ball through up in air is technically in flight. While gliding implies flight with no thrust and is the primary mode for Albatross flight, they still produce trust by flapping their wings.