1) Al fresco 2) Alfresco 3) Exterior 4) Open 5) Open air 6) Out of doors 7) Outside 8) Outside a building 9) What en plein air means 10) Where the air is unconfined 11) Where to spend a sunny day 1) Alfresco 2) Open 
• (adv.) Abread; out of the house; out of doors.
Out'doors` adverb Abread; out of the house; out of doors. 
[n] - where the air is unconfined
out-of-doors noun where the air is unconfined; `he wanted to get outdoors a little`; `the concert was held in the open air`; `camping in the open`
out of doors; in the open air: He's happiest when he's outdoors.