Greatest

adjective

1. Relatively large in scale, size, extent, number (i.e. having many parts or members) or duration (i.e. relatively long); very big.

   "A great storm is approaching our shores."

2. Of larger size or more importance than others of its kind.

   "the great auk"

3. (qualifying nouns of family relationship) Involving more generations than the qualified word implies — as many extra generations as repetitions of the word great (from 1510s). [see Derived terms]

   "great-grandfather, great-great-grandfather, great-great-great-grandfather"

4. (followed by 'with') Pregnant; large with young; full of.

   "great with child"

5. (except with 'friend' and similar words such as 'mate','buddy') Intimate; familiar.