1. in the fifth place; as the fifth point in a series or list
Usage: used to introduce the fifth item in an enumeration or argument

Examples

• First, we need funding. Second, we need staff. Third, we need equipment. Fourth, we need training. Fifthly, we need community support.
• The proposal has several advantages: firstly, it is cost-effective; secondly, it is sustainable; thirdly, it improves efficiency; fourthly, it reduces waste; and fifthly, it enhances safety.
• Fifthly, I would like to address the environmental concerns raised in the previous discussion.
• The committee considered five criteria: firstly reliability, secondly cost, thirdly durability, fourthly aesthetics, and fifthly maintenance requirements.
• She outlined her argument in five parts, with fifthly being the most important conclusion.