summerful adjective 1noun 1forms 4 adjective1 •Having or characteristic of summer; summery.The summerless year 1927 is brought in as an example of their unutterable folly: that year was as summerful as any other year! — 1926 noun1 •Enough to fill or be produced by a summer.Then suddenly he poured out from his throat Whole summerfuls of song in every note — 1934 formssummerfuls · summersful · more summerful · most summerful