adjective
(chiefly informal) Pleasant, satisfactory.
(chiefly informal) Of a person: friendly, attractive.
Respectable; virtuous.
(with and, chiefly informal) Shows that the given adjective is desirable, or acts as a mild intensifier; pleasantly, quite.
(chiefly informal) Giving a favorable review or having a favorable impression.
(chiefly informal) Showing refinement or delicacy, proper, seemly
(obsolete) Silly, ignorant; foolish.
(now rare) Particular in one's conduct; scrupulous, painstaking; choosy.
(dated) Having particular tastes; fussy, fastidious.
(obsolete) Particular as regards rules or qualities; strict.
Showing or requiring great precision or sensitive discernment; subtle.
(obsolete) Easily injured; delicate; dainty.
(obsolete) Doubtful, as to the outcome; risky.
adverb
(colloquial) Nicely.
interjection
Used to signify a job well done.
Used to signify approval.
noun
niceness.
verb
(transitive, computing, Unix) To run a process with a specified (usually lower) priority.