To delete a contact from your Yahoo! Contacts list:

1. Sign into Yahoo! Mail and select the Contacts tab.
   
   
2. Check the box next to each contact that you want to delete.
   
   
3. Click the Delete button
4. In the confirmation window that pops up, click Delete.

Note: When you delete a contact, it will no longer appear as an autocomplete suggestion as you are typing contacts into the "TO", "CC" or "BCC" field of an email.