single
noun
a base hit on which the batter stops safely at first base
Synonymsbinglethe 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”
verb
hit a single
“the batter singled to left field”
adjective
being or characteristic of a single thing or person
“individual drops of rain”
“please mark the individual pages”
Synonymsindividualused of flowers having usually only one row or whorl of petals
“single chrysanthemums resemble daisies and may have more than one row of petals”
Oppositesdoubleexisting 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”
Oppositesmultiplenot married or related to the unmarried state
“unmarried men and women”
“unmarried life”
Synonymsunmarriedcharacteristic of or meant for a single person or thing
“an individual serving”
“single occupancy”
Synonymsindividualhaving uniform application
“a single legal code for all”
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”
Source: WordNet 3.1, Princeton University