single

nouns

a base hit on which the batter stops safely at first base
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"

verbs

hit a single
"the batter singled to left field"
domain category
a ball game played with a bat and ball between two teams of nine players; teams take turns at bat trying to score runs
"he played baseball in high school"; "there was a baseball game on every empty lot"; "there was a desire for National League ball in the area"; "play ball!"
is a type of (narrower)
cause to move by striking
"hit a ball"

adjectives

being or characteristic of a single thing or person
"individual drops of rain"; "please mark the individual pages"; "they went their individual ways"
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"
antonym
domain category
the branch of biology that studies plants
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"
antonym
is similar to
occurring singly; not one of a pair
"the azygous muscle of the uvula"
is similar to
designed for or restricted to a single person
"a one-man show"; "a one-person tent"; "Sarah Silverman's hilarious one-woman show"
is similar to
being the only one; single and isolated from others
"the lone doctor in the entire county"; "a lonesome pine"; "an only child"; "the sole heir"; "the sole example"; "a solitary instance of cowardice"; "a solitary speck in the sky"
is similar to
the single one of its kind
"a singular example"; "the unique existing example of Donne's handwriting"; "a unique copy of an ancient manuscript"; "certain types of problems have unique solutions"
is similar to
constituting a class of its own; unique
"a history book sui generis"; "sui generis works like Mary Chestnut's Civil War diary"
is similar to
consisting of or involving a single element or component
"in a unary operation in a mathematical system one element is used to yield a single result"
is similar to
based on the system of having only one member from each district (as of a legislature)
"a uninominal electoral system"
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?"
characteristic of or meant for a single person or thing
"an individual serving"; "single occupancy"; "a single bed"
having uniform application
"a single legal code for all"
is similar to
always the same; showing a single form or character in all occurrences
"a street of uniform tall white buildings"
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"
is derived from