Definition of "slender"

Sepia Delft tiles surrounded the fireplace, their crudely drawn Biblical scenes in faded cyclamen blending with the pinkish pine, while above them, instead of a mantelshelf, there was an archway high enough to form a balcony with slender balusters and a tapestry-hung wall behind.

1963, Margery Allingham, chapter 3, in The China Governess‎

The grounds for the conjecture are somewhat slender.

1911, James George Frazer, The Golden Bough, volume 9, page 413

The slender service between Ellesmere Port and Helsby has been added, too.

2022 January 26, Barry Doe, “Fabrik offers an end to hard times”, in RAIL, number 949, page 42