Synonyms for In the meantime:

adv

while (adverb)
up to, meantime, for the time being, always, often, all along, in the course of, During, meanwhile, till, for now, throughout, yet, up until.

adv.

all (adverb)
meanwhile, meantime.
during the intervening time (adverb)
for the time being, meanwhile, meantime.
while (adverb)
up to, meantime, for the time being, always, often, all along, in the course of, During, meanwhile, till, for now, throughout, yet, up until.

n.

in the interim, until then, for the nonce.

Other synonyms:

Other relevant words:
for the nonce, in the interim.