Definitions of heather:

• noun:   common Old World heath represented by many varieties; low evergreen grown widely in the northern hemisphere
• noun:   interwoven yarns of mixed colors producing muted grayish shades with flecks of color
• name:  A female given name (very common: 1 in 296 females; popularity rank in the U.S.: #53)
• name:  A surname (very rare: popularity rank in the U.S.: #19155)