adjective(also plain vanilla) informal
- having no special or extra features; ordinary or standard:choosing plain vanilla technology wherever you can will save you money the original, vanilla MP3 format is still the most commonly encountered form of the technology they seem to be quite content in their plain vanilla domestic life his sex life is totally vanilla
mid 17th century: from Spanish vainilla 'pod', diminutive of vaina 'sheath, pod', from Latin vagina 'sheath'. The spelling change was due to association with French vanille
Spell vanilla with one n and a double l.