A feature is something that WordPress (or any of its plugins) can do (like sorting posts ) or has (like posts and images themselves). Click to see about WordPress features.
WordPress features
Descriptions of features
By the Web Warlock, Thursday, 26/Aug/2010 0:44
Description of a feature of WordPress® (either by core, plugin or theme).
Post type features
By the Web Warlock, Wednesday, 28/Jul/2010 1:32
The so-called post type features are flags (boolean values) that mark if a given part/meta box in the admin/edit section will be used or not.
Post types
By the Web Warlock, Saturday, 24/Jul/2010 0:03
WordPress stores different types of data in the posts table, not only "regular" posts but also Pages, attachments, menu items, post revisions and other custom data. Each of this types of data are called "post types".
User capabilities
By the Web Warlock, Saturday, 26/Jun/2010 15:29
Capabilities indicate if a user (or role) can do a given task, access a given feature, etc.