meaning - What is the definition of non-ladder or non-run

I found this word in a dictionary (my native language to English), but I cannot find it in any English one.

OSHA & IBC Industrial & Commercial Stair Code Requirements - Lapeyre Stair

How to Build Your Social Media Marketing Strategy

SlipNOT Ladder Rung 3/4 Diameter - Carbon Steel - P&R Metals

Jacob's Ladder (1990) - IMDb

Ladder Logic Basics - Ladder Logic World

The Ladder of Inference: Understanding Its 7 Rungs

Program for Shortest Job First (or SJF) CPU Scheduling

What Is Affirmative Action? How It Works and Example

Stage One Media, Inc.

Delta Hedging: Definition, How It Works, and Example

The Many Different Types of Ladders: The Ultimate Guide