PLUSSED
Etymology 1
Verb
plussed
simple past tense and past participle of plus
Adjective
plussed (not comparable)
(computing, informal) Containing a plus sign.
Etymology 2
Adjective
plussed (not comparable)
(informal) Bothered, fazed, vexed; not nonplussed (“unfazed, unaffected, unimpressed”).
Source: Wiktionary
PLUS
Plus, a. Etym: [L., more; akin to Gr. full. See Full, a., and cf.
Più, Pleonasm.]
1. (Math.)
Definition: More, required to be added; positive, as distinguished from
negative; -- opposed to Ant: minus.
2. Hence, in a literary sense, additional; real; actual.
Success goes invariably with a certain plus or positive power.
Emerson.
Plus sign (Math.), the sign (+) which denotes addition, or a positive
quantity.
Source: Webster’s Unabridged Dictionary 1913 Edition