1. in a state of nervous excitement or agitation
Usage: informal; often used predicatively

1. in a twittering or trembling manner; with nervous excitement
Usage: informal; less common than adjective form

Examples

• She was all atwitter about her upcoming wedding.
• The fans were atwitter when the celebrity arrived at the event.
• He felt atwitter with anticipation before the big game.
• The whole office was atwitter with gossip about the promotion.
• She spoke atwitter, her words tumbling out in excited bursts.
• The children were atwitter on the morning of the field trip.