Lack

1. To be without or destitute of; to want; to need.
2. Deficiency; want; need; destitution; failure; as, a lack of sufficient food.
3. To be in want.
4. To blame; to find fault with.
5. Blame; cause of blame; fault; crime; offense.
6. To be wanting; often, impersonally, with of, meaning, to be less than, short, not quite, etc.
7. Exclamation of regret or surprise.