adj Number-two; following after the first one with nothing between them. The ordinal number corresponding to the cardinal number two.
adj Next to the first in value, power, excellence, dignity, or rank; secondary; subordinate; inferior.
adj Being of the same kind as one that has preceded; another.
adv (with superlative) After the first; at the second rank.
adv After the first occurrence but before the third.
n Something that is number two in a series.
n Something that is next in rank, quality, precedence, position, status, or authority.
n The place that is next below or after first in a race or contest.
n (usually in the plural) A manufactured item that, though still usable, fails to meet quality control standards.
n (usually in the plural) An additional helping of food.
n A chance or attempt to achieve what should have been done the first time, usually indicating success this time around. (See second-guess.)
n (music) The interval between two adjacent notes in a diatonic scale (either or both of them may be raised or lowered from the basic scale via any type of accidental).
n The second gear of an engine.
n (baseball) Second base.
n The agent of a party to an honour dispute whose role was to try to resolve the dispute or to make the necessary arrangements for a duel.
n A Cub Scout appointed to assist the sixer.
n (informal) A second-class honours degree.
v (transitive) To agree as a second person to (a proposal), usually to reach a necessary quorum of two. (See under [[#Etymology 3]] for translations.)
v To follow in the next place; to succeed.
v (climbing) To climb after a lead climber.
n One-sixtieth of a minute; the SI unit of time, defined as the duration of 9,192,631,770 periods of radiation corresponding to the transition between two hyperfine levels of caesium-133 in a ground state at a temperature of absolute zero and at rest.
n A unit of angle equal to one-sixtieth of a minute of arc or one part in 3600 of a degree.
n (informal) A short, indeterminate amount of time.
v (transitive, UK) To transfer temporarily to alternative employment.
v (transitive) To assist or support; to back.
v (transitive) To agree as a second person to (a proposal), usually to reach a necessary quorum of two. (This may come from the English adjective above.)
v (transitive, music) To accompany by singing as the second performer.
n One who supports another in a contest or combat, such as a dueller's assistant.
n One who supports or seconds a motion, or the act itself, as required in certain meetings to pass judgement etc.
n (obsolete) Aid; assistance; help.