From WordNet (r) 3.0 (2006):
single
adj 1: being or characteristic of a single thing or person;
"individual drops of rain"; "please mark the individual
pages"; "they went their individual ways" [syn:
individual, single] [ant: common]
2: used of flowers having usually only one row or whorl of
petals; "single chrysanthemums resemble daisies and may have
more than one row of petals" [ant: double]
3: existing alone or consisting of one entity or part or aspect
or individual; "upon the hill stood a single tower"; "had but
a single thought which was to escape"; "a single survivor";
"a single serving"; "a single lens"; "a single thickness"
[ant: multiple]
4: not married or related to the unmarried state; "unmarried men
and women"; "unmarried life"; "sex and the single girl";
"single parenthood"; "are you married or single?" [syn:
unmarried, single] [ant: married]
5: characteristic of or meant for a single person or thing; "an
individual serving"; "single occupancy"; "a single bed" [syn:
individual, single(a)]
6: having uniform application; "a single legal code for all"
7: not divided among or brought to bear on more than one object
or objective; "judging a contest with a single eye"; "a
single devotion to duty"; "undivided affection"; "gained
their exclusive attention" [syn: single(a), undivided,
exclusive]
n 1: a base hit on which the batter stops safely at first base
[syn: single, bingle]
2: the smallest whole number or a numeral representing this
number; "he has the one but will need a two and three to go
with it"; "they had lunch at one" [syn: one, 1, I,
ace, single, unity]
v 1: hit a single; "the batter singled to left field"