Opt-In – A marketing term where the recipient of the communication has specifically given authorisation to receive it.
Opt-Out – The opposite, where recipient is deemed to have agreed to accept marketing communications unless they explicitly say otherwise. E.g. ‘If you would prefer not to receive such communications then please tick the box.’
Outline – Either the outline of a shape, or a method of converting text within a document to outlines prior to printing to avoid issues which may arise due to missing fonts.
Overnight-Test – The process of leaving a project that you’ve been working on too long so that you can no longer “see the woods for the trees”. Coming back to the project after a break lets you see it how it really is.