1.  singly(r = adv.all) - one by one; one at a time; "they were arranged singly"
Antonym: multiply

2.  singly(r = adv.all) individually, on an individual basis, one by one, separately, severally - apart from others; "taken individually, the rooms were, in fact, square"; "the fine points are treated singly"

1.  Individually; particularly; severally; as, to make men singly and personally good. [1913 Webster]

2.  Only; by one's self; alone. [1913 Webster]
"Look thee, 't is so! Thou singly honest man." [1913 Webster]

3.  Without partners, companions, or associates; single-handed; as, to attack another singly. [1913 Webster]
"At omber singly to decide their doom." [1913 Webster]

4.  Honestly; sincerely; simply. Johnson. [1913 Webster]

5.  Singularly; peculiarly. Milton. [1913 Webster]

N  unity, oneness, individuality, solitude, isolation, unification, one, unit, ace, individual, none else, no other, one, sole, single, solitary, unitary, individual, apart, alone, kithless, unaccompanied, unattended, solus, single-handed, singular, odd, unique, unrepeated, azygous, first and last, isolated, insular, monospermous, unific, uniflorous, unifoliate, unigenital, uniliteral, unijocular, unimodal, unimodular, lone, lonely, lonesome, desolate, dreary, insecable, inseverable, indiscerptible, compact, indivisible, atomic, irresolvable, singly, alone, by itself, per se, only, apart, in the singular number, in the abstract, one by one, one at a time, simply, one and a half, sesqui-, natura il fece, e poi roppe la stampa, du fort au faible, two souls with but a single thought, two hearts that beat as one.