1. be obvious or make something obvious
bright colours stick out a mile
This idiom can be used when speaking about the noticeable aspect of someone or something. If someone sticks out a mile, they are standing out or very noticeable; usually because they are obviously different to others around them. Similar in meaning to 'stick out like a sore thumb'. It is a popular expression, used in social or professional situations. Note that there is no difference in meaning between 'stick out a mile' and 'stand out a mile'. They can be used interchangeably.