Synonym: increase, join, put together, sum up, total, unite. Antonym: subtract. Similar words: add up, added, add in, address, add up to, addition, additional, in addition. Meaning: [æd] 
n. a condition (mostly in boys) characterized by behavioral and learning disorders. v. 1. make an addition (to); join or combine or unite with others; increase the quality, quantity, size or scope of 2. state or say further 3. bestow a quality on 4. make an addition by combining numbers 5. determine the sum of 6. constitute an addition.
n. a condition (mostly in boys) characterized by behavioral and learning disorders. v. 1. make an addition (to); join or combine or unite with others; increase the quality, quantity, size or scope of 2. state or say further 3. bestow a quality on 4. make an addition by combining numbers 5. determine the sum of 6. constitute an addition. 
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1) Most restaurants add a 10 per cent service charge.
2) Shall I add your name to the list?
3) Add a teaspoonful of mixed herbs.
4) Add fertilizer to enrich the soil.
5) Add orange paint to get a warmer hue.
6) Add the numbers in brackets first.
7) Boil plenty of salted water,(http://sentencedict.com/add.html) then add the spaghetti.
8) If the dough is sticky, add more flour.
9) Add one heaped tablespoon of salt.
10) I should add that we are very lucky.
11) Beat up the eggs before you add the flour.
12) Add up the numbers in each column.
13) What other ways do you know to add variety?
14) We should add this clause to the contract.
15) Use over your favourite lipstick to add extra gloss.
16) Whisk the egg and then add the flour.
17) Add a length of ribbon tied in a bow.
18) Add some hot English mustard.
19) Add the onion and cook for three minutes.
20) Add a few drops of peppermint flavouring.
21) Add a little more liquid to the sauce.
22) If the mixture seems dry, add water.
23) Five and eleven add up to sixteen.
24) Chop the celery and add it to the salad.
25) Add some soda to the whisky, please.
26) Let's add up the pros and cons.
27) Simply add hot water and stir.
28) Can you add up this column of figures?
29) Cross-training helps you add variety to your workouts.
30) Add a few drops of lime juice.
More similar words: add up, added, add in, address, add up to, addition, additional, in addition, in addition to.