Longman Dictionary of Contemporary English
Wiktionary
n. 1 A person whose job is to clean windows. 2 A product, such as Windex, used to clean windows.
WordNet
n. someone who cleans windows for pay
Wikipedia
Window cleaning, or window washing, is the cleaning of architectural glass used for structural, lighting, or decorative purposes. It can be done manually, using a variety of tools for cleaning and access. Technology is also employed and increasingly, automation.
Commercial work is contracted variously from in-person transactions for cash or barter, to formal tender processes. Regulations, licensing, technique, equipment and compensation vary nationally and regionally.
Usage examples of "window cleaner".
He had his watch in his hand and was giving most minute instructions to the window cleaner about something.
They jingle sleigh bells and carry spray bottles of Windex, blue window cleaner they use to squirt each other in the mouth.
For window cleaner it tastes just Like Bombay Sapphire gin-and-tonic.
Waving for her to follow, he led the way back and handed her the window cleaner again.
She remembered somebody saying saucers of window cleaner neutralized all the little stray smells any house generates.
He wanted to avoid any further encounters but he missed the window cleaner fifteen rungs up a ladder outside the doctor's surgery.
Then you won't have to mess around popping off fingers with window cleaner, you can go for the whole hand, maybe even an arm.