single

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”

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”

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”
• “separate rooms”
• “single occupancy”
• “a single bed”

having 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”
• “undivided affection”
• “gained their exclusive attention”

involved two individuals

• “single combat”

individual and distinct

• “pegged down each separate branch to the earth”
• “a gift for every single child”

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”

hit a one-base hit