A more thorough explanation:

Definition:

Oral, adj. refers to something that is spoken or uttered, rather than expressed in writing.

Examples:

• An oral agreement between two parties is not written down, but rather agreed upon through spoken communication.
• A oral presentation is one that is given through spoken words, rather than written or visual aids.

Explanation: The term oral is used to describe something that is communicated through spoken words, rather than written down. The examples provided illustrate this definition by showing how an agreement or presentation can be made through verbal communication, rather than through written documents or visual aids.