Antonym: shallow. Similar words: deep in thought, deer, deem, indeed, commandeer, keep, weep, sheep. Meaning: [diːp] 
n. 1. the central and most intense or profound part 2. a long steep-sided depression in the ocean floor 3. literary term for an ocean. adj. 1. relatively deep or strong; affecting one deeply 2. marked by depth of thinking 3. having great spatial extension or penetration downward or inward from an outer surface or backward or laterally or outward from a center; sometimes used in combination 4. very distant in time or space 5. extreme 6. having or denoting a low vocal or instrumental range 7. strong; intense 8. relatively thick from top to bottom 9. extending relatively far inward 10. (of darkness) very intense 11. large in quantity or size 12. with head or back bent low 13. of an obscure nature 14. difficult to penetrate; incomprehensible to one of ordinary understanding or knowledge 15. exhibiting great cunning usually with secrecy. adv. 1. to a great depth 2. to an advanced time 3. to far into space.
n. 1. the central and most intense or profound part 2. a long steep-sided depression in the ocean floor 3. literary term for an ocean. adj. 1. relatively deep or strong; affecting one deeply 2. marked by depth of thinking 3. having great spatial extension or penetration downward or inward from an outer surface or backward or laterally or outward from a center; sometimes used in combination 4. very distant in time or space 5. extreme 6. having or denoting a low vocal or instrumental range 7. strong; intense 8. relatively thick from top to bottom 9. extending relatively far inward 10. (of darkness) very intense 11. large in quantity or size 12. with head or back bent low 13. of an obscure nature 14. difficult to penetrate; incomprehensible to one of ordinary understanding or knowledge 15. exhibiting great cunning usually with secrecy. adv. 1. to a great depth 2. to an advanced time 3. to far into space. 
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1. Still waters have deep bottoms.
2. Beauty is only skin deep.
3. Beauty is but skin deep.
4. A great ship asks deep water. 
5. A great ship asks for deep waters.
6. A great ship asks deep waters.
7. Deep rivers move in silence, shallow brooks are noisy.
8. Silent men, like still waters, are deep and dangerous.
9. Smooth water runs deep.
10. I am cought between the devil and the deep blue sea.
11. A thousand words will not leave so deep an impression as one deed.
12. Sincerity, a deep genuine, heart-felt sincerity, is a trait of true and noble manhood.
13. Still waters run deep.
14. The path petered out deep in the forest.
15. The night deep dark blue eyes.
16. She had just woken from a deep sleep.
17. Solid low-level waste will be disposed of deep underground.
18. The interviewer probed deep into her private life.
19. A deep mutual respect and understanding developed between them.
20. Hospital bills had made deep inroads into her savings.
21. He was in deep mourning for his dead wife.
22. He answered my question in a surprisingly deep bass.
23. Earthworms burrow deep into the subsoil.
24. He dug a deep hole in the garden.
25. He had a deep affection for his aunt.
26. He took a deep swig from the bottle.
27. My thoughts are deep into you.
28. Histories make men wise ; poems witty; the mathematics subtle; natural philosophy deep ; moral grave ; logic and rhetoric able to contend.
29. He who would search for pearls must dive below(or deep).
30. The secret of a good momory is attention(Sentence dictionary), and attention to a subject depends upon our interest in it-- We rarely forget that which has made a deep impression on our minds.
More similar words: deep in thought, deer, deem, indeed, commandeer, keep, weep, sheep, creep, steep, sweep, sleep, keep to, sleepy, keep up, keep out, keep on, keep off, keep down, keep away, sheepish, weeping, sweep up, keep out of, keep from, go to sleep, keep back, fall asleep, keep up with, keep in mind.