The following program consists of two exercises each for the biceps and the triceps. This allows you to work different areas of each of these muscle groups.
Pick a weight that allows you to complete between 8 and 12 repetitions. Perform two to three sets of each exercise before moving on to the next exercise. Give the muscles time to recover between workouts -- at least 48 hours.
BICEPS
Standing Biceps Curl with Dumbbells
Stand with feet shoulder-width apart and knees slightly bent, or sit in upright position.
Grasp dumbbells with an underhand grip (palms facing forward), arms hanging down at your sides.
Flex at the elbows and curl dumbbells up to approximately shoulder level. Keep elbows close to sides throughout movement -- don't allow them to move forward. This exercise may be done one arm at a time.
Return to starting position.
Hammer Curls with Dumbbells
Stand with feet shoulder-width apart and knees slightly bent, or sit in upright position.
Grasp dumbbells with palms facing each other, arms hanging down at your sides.
Flex at the elbows and curl dumbbells up to approximately shoulder level. Keep elbows close to sides throughout movement -- don't allow them to move forward. This exercise may be done one arm at a time.
Return to starting position.
Note: Remember to keep back and head straight in a neutral position throughout movement. Shoulders should be stabilized by squeezing shoulder blades together slightly -- only the elbow joint should move.
TRICEPS
Lying Triceps Extension with Dumbbells
Sit in upright position on a flat bench. Rest dumbbells on corresponding thighs.
Lie on back and bring the dumbbells to your chest. Press up so they are directly over shoulders with palms facing in.
Lower dumbbells toward forehead by bending elbows to 90°. Elbows should remain pointing forward. Arms shouldn't move from the shoulder to the elbow.
Return to start position.
Triceps Kickback with Dumbbells
Place right knee and left hand on flat bench. Keep back flat.
Grasp dumbbell. Raise right arm up so that upper arm is parallel to floor with lower arm hanging straight down toward floor -- palm facing in.
Keep upper arm parallel to floor and raise dumbbell straight back until arm is almost straight. Don't lock out elbow.
Lower dumbbell slowly back to starting position, keeping your upper arm parallel to the floor. All the movement should be in your elbow, not your shoulder.
After performing all the repetitions with the right arm, reverse position and perform move with left arm.
Note: For both exercises, remember to keep back and head straight in a neutral position -- hyperextension may cause injury. Keep shoulder stabilized throughout movement.And remember conradelizabeth healthy eating, fruit vegies, and even the occasional creatine bar, can help,. just don'ty over do It.
Good Luck :)

I just pu "building muscle definition for women" in search and cam up with lots of hits. try it and then go surfing for more info.

The concept of 'spot reducing' subcutaneous fat on any area of the body is a myth. It doesn't work and I'll outline a little more on that later on. There are exercises that will help build muscle(as already outlined by Jude) but any exercise program is only as good as:

1. A correct diet (And by diet I don't mean eating less, I mean eating nutritionally balanced meals and the correct amount of calories for you)
2. The effort you put in.

For a woman to see definition, a body fat percentage of roughly 12 - 18% is desirable. Body fat levels decrease all over your body. Have you ever seen someone with a fantastic toned stomach and flabby arms? I doubt it.

What you need then is a challenging all over workout with free weights and some cardio. By challenging I mean pick a weight that you can manage for 10 - 15 reps and go all out on your last set (3 to 5 sets) until you can't do another one. Your first 2 - 3 sets should be a light warm up. the last two should really push you. Thats the key. Otherwise you are just going through the motions. You all so need to cut out fat from your diet. Why consume fats that add to the problem you are trying to solve?

I have included the following 3 websites that provide information on training, good vs bad fats and a calorie counter and sample training guide from maximuscle. i know this info is brief, so if you require more details in any area don't hesitate to drop me a line.Best of luck.

http://leighpeele.blogspot.com/2007/05/c...

http://www.healthcastle.com/goodfats-bad...

http://www.maximuscle.co.uk