The adj mild has 3 senses (first 1 from tagged texts)
1. (7) mild -- (moderate in type or degree or effect or force; far from extreme; "a mild winter storm"; "a mild fever"; "fortunately the pain was mild"; "a mild rebuke"; "mild criticism")
2. meek, mild, modest -- (humble in spirit or manner; suggesting retiring mildness or even cowed submissiveness; "meek and self-effacing")
3. balmy, mild, soft -- (mild and pleasant; "balmy days and nights"; "the climate was mild and conducive to life or growth"; "a soft breeze")