1. ground¹ noun, the land surface
2. ground² verb, the past tense and past participle of grind
3. ground bass or ground noun, music a short melodic bass line that is repeated over and over again
4. (and 38 more)

By Defined by Harper Collins 

Collins English Electronic Dictionary - Digital Edition: 2008 © HarperCollins Publishers 2008

1. he dug into the ground outside his house
2. football ground
3. burial grounds
4. level ground
5. high ground

Synonyms

set, pitch, reason, earth, land, terra firma, arena, stadium, park (informal), field