WordNet sense 1 (low or inferior in station or quality):

low, lowly, small

WordNet sense 2 (of or characteristic of low rank or importance):

inferior

WordNet sense 3 (humble in spirit or manner; suggesting retiring mildness or even cowed submissiveness):

meek, mild

WordNet sense 4 (marked by meekness or modesty; not arrogant or prideful):

humble

WordNet sense 5 (lacking pretension or affectation):

unpretentious

WordNet sense 6 (not arrogant or presuming):

unassuming, retiring

WordNet sense 7 (decently clothed):

decent

WordNet sense 8 (affectedly modest or shy especially in a playful or provocative way):

coy, demure

WordNet sense 9 (being within reasonable or average limits; not excessive or extreme):

moderate, moderate

WordNet sense 10 (limited in size or scope):

minor, small-scale, pocket-size, pocket-sized

WordNet sense 11 (small in range or scope):

limited

WordNet sense 12 (free from ostentation or pretension):

restrained, unostentatious

WordNet sense 13 (marked by prudence or modesty and wise self-restraint):

discreet