[adj] evidencing little spirit or courage; overly submissive or compliant; "compliant and anxious to suit his opinions of those of others"; "a fine fiery blast against meek conformity"- Orville Prescott; "she looked meek but had the heart of a lion"; "was submissive and subservient"
[adj] lacking spirit; "it was a spiritless attempt"
[adj] lacking ardor or vigor or energy; "a spiritless reply to criticism"