Vine's Expository Dictionary of NT Words 
"a thought by way of a design" (akin to epinoeo, "to contrive," epi, intensive, noeo, "to consider"), is used in Acts 8:22 . In the Sept., Jeremiah 20:10 .
"a purpose, device of the mind" (akin to noeo, see No. 1), is rendered "thought" in 2—Corinthians 10:5 , "thoughts" in Philippians 4:7 , RV: see Device , No. 2.
"a thought," occurs in Luke 11:17 , where the sense is that of "machinations."
is translated "thoughts" in Matthew 9:4; 12:25; Hebrews 4:12 : see Device , No. 1.
is translated "thoughts" in Romans 2:15 : see Imagination , No. 1.
"reasoning," is translated "thoughts" in Matthew 15:19; Mark 7:21; Luke 2:35; 6:8; in Luke 5:22 , AV, RV, "reasonings;" in Luke 9:47 , AV, RV, "reasoning," and Luke 24:38 , AV, RV, "reasonings;" so 1—Corinthians 3:20; in Luke 9:46 , AV and RV, "reasoning;" "thoughts" in James 2:4 , AV and RV. See Dispute , Imagination , Reasoning.
King James Dictionary 
THOUGHT, pret. and pp. of think pronounced thaut.
THOUGHT, a. thaut. primarily the passive participle of think, supra.
1. Properly, that which the mind thinks. Thought is either the act or operation of the mind, when attending to a particular subject or thing or it is the idea consequent on that operation.
We say, a man's thoughts are employed on government, on religion, on trade or arts, or his thoughts are employed on his dress or his means of living. By this we mean that the mind is directed to that particular subject or object that is, according to the literal import of the verb think, the mind, the intellectual part of man, is set upon such an object, it holds it in view or contemplation, or it extends to it, it stretches to it.
Thought cannot be superadded to matter, so as in any sense to render it true that matter can become cogitative.
2. Idea conception. I wish to convey my thoughts to another person. I employ words that express my thoughts, so that he may have the same ideas in this case, our thoughts will be alike. 3. Fancy conceit something framed by the imagination.
Thoughts come crowding in so fast upon me, that my only difficulty is to choose or reject.
4. Reflection particular consideration.
Why do you keep alone?
Using those thoughts which should have died
With them they think on.
5. Opinion judgment.
Thus Bethel spoke, who always speaks his thoughts.
6. Meditation serious consideration.
Pride, of all others the most dangerous fault,
Proceeds from want of sense or want of thought.
7. Design purpose.
All their thoughts are against me for evil. Psalms 56; 33 .
8. Silent contemplation. 9. Solicitude care concern.
Hawis was put in trouble, and died with thought and anguish before his business came to an end.
10. Inward reasoning the workings of conscience.
Their thoughts the meanwhile accusing or else excusing one another. Romans 2
11. A small degree or quantity as a thought longer a thought better. Not in use.
To take thought, to be solicitous or anxious. Matthew 6
Charles Buck Theological Dictionary 
An image of any thing formed in the mind; sentiment, reflection, opinion, design. As the thoughts are the prime movers of the conduct; as in the sight of the Divine Being, they bear the character of good or evil; and as they are therefore cognizable at his tribunal; the moral regulation of them is of the greatest importance. It is of consequence to inquire what thoughts ought to be rejected and what to be indulged. Those of an evil nature, which ought to be banished, are,
1. Fretful and discontented thoughts.
2. Anxious and apprehensive thoughts.
3. Angry and wrathful thoughts.
4. Malignant and revengeful thoughts.
5. Such as are foolish, trifling, and unreasonable.
6. Wild and extravagant, vain and fantastical.
7. Romantic and chimerical.
8. Impure and lascivious.
9. Gloomy and melancholy.
10. Hasty and volatile.
11. Profane and blasphemous. The thoughts we ought to indulge, are those which give the mind a rational or religious pleasure; tend to improve the understanding; raise the affections to divine objects; to promote the welfare of our fellow creatures, and withal the divine glory. To bring the mind into a habit of thinking as we ought to think, there should by a constant dependence on and imploring of divine grace; an increasing acquaintance with the sacred Scriptures; and improvement of every opportunity of serious conversation; a constant observance of the works of God in creation, providence, and grace; and, lastly, a deep sense of the realities of an eternal world as revealed in the word of God. Mason on Self-knowledge; Watts on the Mind; Goodwin's Vanity of Thoughts.
See his Works, vol. 3: p. 232.
Hastings' Dictionary of the Bible 
THOUGHT . In 1 Samuel 9:5 , in Matthew 6:26 (as well as in the foll. Matthew 6:27-28; Matthew 6:31; Matthew 6:34 ), in Matthew 10:19 , in Mark 13:11 , and in Luke 12:11; Luke 12:22; Luke 12:25-26 the Eng. word ‘thought’ Is used in AV [Note: Authorized Version.] in the old sense of ‘grief or anxiety.’ Thus Mark 13:11 ‘Take no thought beforehand’ does not mean do not think or plan . but be not burdened with anxiety beforehand.
Webster's Dictionary 
(1): imp. & p. p. of Think.
(2): ( n.) The act of thinking; the exercise of the mind in any of its higher forms; reflection; cogitation.
(3): ( n.) Meditation; serious consideration.
(4): ( imp. & p. p.) of Think
(5): ( n.) That which is thought; an idea; a mental conception, whether an opinion, judgment, fancy, purpose, or intention.
(6): ( n.) Solicitude; anxious care; concern.
(7): ( n.) A small degree or quantity; a trifle; as, a thought longer; a thought better.
International Standard Bible Encyclopedia 
thôt : The most frequent word in the Old Testament ( מחשׁבת , maḥăshebheth , from the verb חשׁב , ḥāshabh , "to think") refers to a "device," or a purpose firmly fixed, as in the passage in Isa (55:7-9) where the "thought" of God and of man are contrasted (compare Psalm 40:5; Psalm 92:5; Jeremiah 29:11 ). In the New Testament διαλογισμός , dialogismós ( Matthew 15:19; 1 Corinthians 3:20 ), refers to the inner reasoning or deliberation of one with himself. See Think .