Whats the meaning of observer?

Definition of observer : one that observes : such as. a : a representative sent to observe but not participate officially in an activity (such as a meeting or war) b : an expert analyst and commentator in a particular field political observers.

The observer pattern is a software design pattern in which an object, named the subject, maintains a list of its dependents, called observers, and notifies them automatically of any state changes, usually by calling one of their methods.

An observer is a meeting role granted by some organizations to non-members to allow them to monitor or participate in the organization’s activities .

Design Patterns – Observer Pattern

The definition of an observation is the act of noticing something or a judgment or inference from something seen or experienced. An example of observation is the watching of Haley’s Comet . An example of observation is making the statement that a teacher is proficient from watching him teach several times.

An observer is someone who watches or pays attention to something — if you’re an observer of current events, you probably watch the news and read the newspaper every day to keep up with what’s going on.