1. most full of sparkles; shining most brightly with small flashes of light
Usage: superlative form of sparkly
2. most lively, animated, or vivacious in personality or manner
Usage: informal

Examples

• She wore the sparkliest dress at the party.
• The sparkliest ornament hung at the top of the Christmas tree.
• Her eyes were the sparkliest I’d ever seen when she smiled.
• The sparkliest personality in the room belonged to the host.
• Among all the jewelry, this necklace is the sparkliest.
• The sparkliest snow crystals caught the morning sunlight.