1. mod. stingy. She’s really tight with her cash.
2. mod. alcohol intoxicated. Frank was tight and didn’t want to drive.
3. mod. stressful; with little margin for error. When the schedule is tight and we are busy as all get out, the telephone won’t stop ringing.
4. mod. cool; super. His new car is tight!
5. mod. close to someone; friendly with someone. Those two are really tight. True buds.