fully (adv.)

Old English fullice "entirely; perfectly; completely;" see full (adj.) + -ly (2). Of similar formation are Dutch vollijk, German ööllig, Danish fuldelig.

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Definitions of fully from WordNet

fully (adv.)
to the greatest degree or extent; completely or entirely; (`full' in this sense is used as a combining form);
he didn't fully understand
fully grown
Synonyms: to the full / full
fully (adv.)
sufficiently; more than adequately;
the evidence amply (or fully) confirms our suspicions
they were fully (or amply) fed
Synonyms: amply
fully (adv.)
referring to a quantity;
Synonyms: in full