Definitions of slender:

• adjective:   small in quantity

  Example: "Slender wages"

• adjective:   having little width in proportion to the length or height

  Example: "A slender pole"

• adjective:   very narrow
• adjective:   being of delicate or slender build

  Example: "She was slender as a willow shoot is slender- Frank Norris"

• adjective:   gracefully slender; moving and bending with ease