digit
noun [ C ]
uk/ˈdɪdʒɪt/ usany one of the ten written numbers 0 to 9:
Your password should contain a mixture of letters and digits.
a four-digit/10-digit, etc. number
single/double/triple, etc. digit
used to say whether a number is between 1 and 9, between 10 and 99, between 101 and 999, etc.:
He forecast that double-digit inflation would return.
single-digit, etc. losses/gains
in single/double, etc. digits His popularity has fallen so far, his poll ratings are now in single digits.
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figure noun