Explore  Outdoor  Topic
                                                                                                                            
                                                                                                        
                                                    - après-ski
 - backpack
 - beach ball
 - beach chair
 - bedroll
 - big dipper
 - big top
 - big wheel
 - billy
 - birdseed
 - bird table
 - boardwalk
 - boating
 - bonfire
 - boomerang
 - botanical garden
 - briquette
 - camp
 - camper
 - campground
 - campsite
 - campstool
 - caravanning
 - coarse fishing
 - crampon
 - cyclist
 - dovecot
 - driving range
 - fairground
 - Ferris wheel
 - fête
 - field glasses
 - fisherman
 - fishing
 - fishing line
 - fishing rod
 - fishing tackle
 - flysheet
 - Frisbee
 - funfair
 - garden party
 - ghost train
 - ground cloth
 - groundsheet
 - gun dog
 - hammock
 - helter-skelter
 - hide
 - hiker
 - horsey
 - jungle gym
 - lido
 - lounger
 - map-reading
 - marina
 - marquee
 - merry-go-round
 - metal detector
 - miniature golf
 - monkey bars
 - mud
 - mud pie
 - nature reserve
 - nudist
 - outdoor
 - outdoors
 - outdoorsy
 - paddling pool
 - parkland
 - Primus
 - promenade
 - Punch and Judy show
 - rambler
 - recreation ground
 - rest area
 - roller coaster
 - roundabout
 - rubber dinghy
 - rucksack
 - sailing boat
 - sandcastle
 - shooting stick
 - sleeping bag
 - sport
 - state park
 - stock car
 - sub-aqua
 - summerhouse
 - sunbathe
 - sun lounger
 - swing set
 - tent
 - theme park
 - topless
 - train spotter
 - wading pool
 - walk
 - walker
 - walking
 - water bottle
 - wigwam
 - wilderness area
 - woodcraft
 - yachting
 - yachtsman
 - yachtswoman
 
From Longman Dictionary of Contemporary Englishoutdoorout‧door /ˌaʊtˈdɔː◂ $ -ˈdɔːr◂/  ●●○ adjective  1 [only before noun]DLOOUT/OUTSIDE existing, happening, or used outside, not inside a building OPP indoor a huge outdoor market outdoor recreational activities outdoor clothing a healthy outdoor life2  → outdoor typeUSAGE: Outdoor, outdoorsOutdoor is an adjective and outdoors is an adverb.You say: an outdoor swimming pool ✗Don't say:  an outdoors swimming poolYou say: They could play outdoors. ✗Don't say:  They could play outdoor.
                                                    
                                                Examples from the Corpus
outdoor• The program of outdoor activities includes skiing, climbing, and hiking.• On warm sunny days, employees can eat in a sheltered outdoor courtyard near an old-fashioned gazebo.• Already they've scaled up their fluid star-burst psychedelia into something that sounds more suited to outdoor festivals than stuffed solid mini-venues.• Most of the activities are routed through woodland and as some of the pathways can be rough outdoor footwear is recommended.• outdoor furniture• Inspired, she reaches for a Williams Sonoma cookbook in search of ideas for more summery outdoor meals.• Intrigued, the aliens monitored the few lyrics they could hear rising up from this outdoor roller ritual.• A ritual that signals for me the beginning of the outdoor season.• outdoor sports• The Form has a bar, sauna and massage rooms, an outdoor swimming pool as well as clock golf and a tennis court.• an outdoor swimming pool• The hotel has an outdoor swimming pool.• Restaurant patrons fed them scraps from their outdoor tables.• Younger volunteers tend to prefer outdoor work. 
