[plus] adj [L, adv., more, fr. neut. of plur-, plus, adj.; akin to Gk pleion more, L plenus full--more at full] (1579) 1: algebraically positive
2: having, receiving, or being in addition to what is anticipated 3 a: falling high in a specified range "a grade of C ~" b: greater than that specified c: possessing a specified quality to a high degree
4: electrically positive
5: relating to or being a particular one of the two mating types that are required for successful fertilization in sexual reproduction in some lower plants (as a fungus)
[2]plus n, pl plus.es also plus.ses (1654) 1: plus sign
2: an added quantity
3: a positive factor or quality
4: surplus [3]plus prep (1668) 1: increased by: with the addition of "four ~ five" "principal ~ interest" "made twelve dollars a week ~ room and board --E. L. Doctorow"
2: besides--used chiefly in speech and casual writing "~ all this, as a sedative it has no equal --Groucho Marx" [4]plus conj (ca. 1950) 1: and "the Smyth Report, ~ an idea and some knowledge of bureaucracy, were all I needed --Pat Frank" "a box-office ~ critical and artistic success --G. J. Nathan" "eats alone, a hot beef sandwich ~ a BLT ~ apple pie --Garrison Keillor"
2: in addition to which "it was an achievement. Plus, I wrote the story and the musical score --Jackie Gleason" "it's also pretty on my open shelves, ~ it smells good --Nikki Giovanni" usage The preposition plus has long been used with a meaning equivalent to and (as in "two plus two"); it is not, therefore, very surprising that in time people have begun to use it as a conjunction much like and. Sense
2. is considered to be an adverb by some commentators. It is used chiefly in speech and in informal writing.