Insufficient or inadequate in amount.
Lacking something essential; often construed with in.
Of a number n, Having the sum of divisors σ(n)<2n, or, equivalently, the sum of proper divisors (or aliquot sum) s(n).
A person who is deficient.
Coherent; well organized.
Into one place; into a single thing; combined.
It has been raining four days together
Without intermission or interruption; continuously; uninterruptedly.
At the same time, in the same place; in close association or proximity.
In a relationship or partnership, for example a business relationship or a romantic partnership.