1. Currently happening
   "an ongoing economic crisis"
   - on-going

See also: current

Encyclopedia: Ongoing

• ooze
• ooze leather
• ooze out
• ooze through
• oozing
• oozy
• op
• op art
• op shop
• op-ed
• op. cit.
• opacification
• opacify
• opacity
• opah
• opal
• opal glass
• opalesce
• opalescence
• opalescent
• opaline
• opalise
• opalize
• opaque
• opaque gem