- lacking a top: a topless bathing suit.
- nude above the waist or hips: topless dancers.
- featuring entertainers, waitresses, etc., who are nude above the waist or hips: a topless bar.
- extremely high: a topless mountain.
- Obsolete. without a peer.
- having no top
- denoting a costume which has no covering for the breasts
- wearing such a costume
- archaic immeasurably high