Plain English Meaning
An ODP that is written out as instructions in words instead of being drawn on a chart. You read it like a paragraph and follow the steps it tells you to fly after takeoff to stay clear of obstacles.
Full Definition
An Obstacle Departure Procedure published in written, narrative form rather than as a charted graphic. Textual ODPs appear in the front section of the Terminal Procedures Publication (TPP) under the heading 'Takeoff Minimums and (Obstacle) Departure Procedures' and describe the required climb gradient, headings, altitudes, and turn instructions in plain text.