1. Plural of ballaster; vertical posts or spindles that form the railing of a staircase, balcony, or deck.
Usage: Also called balusters; commonly used in architecture and construction.

Examples

• The wooden ballasters on the staircase were carved with decorative patterns.
• The deck's ballasters needed to be replaced after years of weather exposure.
• She ran her hand along the smooth ballasters as she climbed the stairs.
• The architect specified wrought-iron ballasters for the balcony railing.
• The ballasters were spaced evenly to meet building safety codes.