- not marked.
- Linguistics.
- characterized by the absence of a distinctive phonological feature, as (p), which, in contrast to (b), lacks the distinctive feature of voicing.
- characterized by the absence of a grammatical marker, as the singular in English in contrast to the plural, which is typically marked by an -s ending.
- neutral with regard to an element of meaning specified by a semantically related item.
- occurring more typically than an alternative form.
- not carrying a mark or marks
- not noticed or observed
