He sucked his thumb when he was a child.

The student idly thumbed through his textbook, struggling to find the chapter he needed.

He is all thumbs when it comes to fixing things.

She has a green thumb and can make any plant thrive.

A rule of thumb is a general guideline or principle based on experience rather than precise measurement or scientific evidence.

I use the thumb index to quickly find the page I need in the dictionary.

Tom Thumb is a character from an English folk tale.

He always tries to put a thumb on the scale to benefit himself.

She was wearing a bright yellow dress and stuck out like a sore thumb .

He tightened the thumbscrew to secure the object.