Definition Of Pattern

Definitions: 

Pattern is a repeated, and decorative design which something is completed. It can be used on curtains, covers, books, chairs etc… patterns are basically used everywhere. Patterns can be structured and linear, however they can also be more free and random.

A free/random pattern:

A structured pattern:

I like this image as it's a natural pattern. The dark blue-green stands out in comparison to the other colours. This would be spread all over the bird, making it stand out due to the pattern of the repeated feathers. 

This image of the ladybird obtains a natural pattern, as the dots are reflected the same on each side of the ladybirds wings.

My own definition of pattern: when something is repeated or obtains a set structure, that's continuous which makes it easy to recognise.