adverb
1.
at one and the same time
events that occurred together
Synonyms: at once, coincidentally, coincidently, coinstantaneously, concurrently, simultaneously
Idioms: all at once, all together
Antonyms: separately
2.
in succession usually without intermission
was moody for days together
Synonyms: consecutively, continually, continuously, hand running, night and day, running, successively, unintermittedly, uninterruptedly
Idioms: on end
3.
in or by combined action or effort
students and faculty protested together
Synonyms: conjointly, jointly, mutually
Related Word: collectively, concertedly, unanimously
Idioms: in one breath, in the same breath, with one accord, with one voice
Antonyms: separately