1. lacking a front; having no front part or facing
2. lacking boldness, courage, or shamelessness; not forward or impudent
Usage: archaic or rare

Examples

• The frontless dress exposed her back entirely.
• The architect designed a frontless building with an open courtyard at its center.
• She wore a frontless gown to the evening gala.
• The frontless design allowed for better ventilation in the summer heat.
• His frontless manner made him seem shy and reserved.