A more thorough explanation:

Definition: Affix means to attach something permanently.

Some common uses of the term “affix” in a legal sense include:

• In the context of real estate, the term “affix” means to attach something to real estate in a permanent way. For example, planting trees or constructing a building on real estate property.
• Affixed items are permanent and cannot be picked up and moved away.
• Affix may also be used to refer to the act of signing or sealing a document. For example, affixing one's signature to a note.

For instance, when a person plants trees or constructs a building on a real estate property, they are affixing those items to the land. These items become a permanent part of the property and cannot be removed. Similarly, when a person signs a document, they are affixing their signature to it, making it a permanent part of the document.