Antonym: thoughtless. Similar words: a thought, forethought, at the thought of, deep in thought, frightful, delightful, though, although. Meaning: ['θɔːtfʊl] 
adj. 1. having intellectual depth 2. exhibiting or characterized by careful thought 3. acting with or showing thought and good sense 4. taking heed; giving close and thoughtful attention 5. considerate of the feelings or well-being of others.
adj. 1. having intellectual depth 2. exhibiting or characterized by careful thought 3. acting with or showing thought and good sense 4. taking heed; giving close and thoughtful attention 5. considerate of the feelings or well-being of others. 
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(31) He stood silent and thoughtful, by himself.
(32) Woody Allen is a sober, thoughtful, intelligent guy.
(33) Rather, more data and more thoughtful analysis are required.
(34) Friends described him as a serious and thoughtful man.
(35) He went very thoughtful for a while.
(36) He had seen a thoughtful look in her eyes.
(37) She was a thoughtful, kind,(http://sentencedict.com/thoughtful.html) and well-behaved girl.
(38) Puny appeared thoughtful, or was it his imagination?
(39) Thoughtful and honest answers to questions.
(40) Jan says her twin babies are completely different: Kelly is a real extrovert while Jessie is quiet and thoughtful.
(41) Chaucer's Criseyde is a dignified and thoughtful widow, who suffers terribly when she leaves Troy.
(42) All new family relationships are delicate and need loving and thoughtful handling.
(43) Thoughtful, well-reasoned covert action, lawfully reported to Congress, can be a tremendous foreign-policy instrument for a president.
(44) The turning point into a new year was a thoughtful time, when one weighed the past against what lay ahead.
(45) With a thoughtful look Goebbels walked back to his desk.
(46) A minority of students took a more thoughtful view of modern physics however.
(47) Both the new managers and their organizations could have been more thoughtful and proactive in managing their first-year learning.
(48) Some thoughtful articles aim to make connections, perhaps across national and language frontiers, or between disciplines.
(49) Stan, a computer systems analyst, approaches pie in a thoughtful, systematic way.
(50) Robert followed him, ponderous and thoughtful, his white tie limp from over-handling.
(51) More thoughtful Conservatives are aware that a movement towards greater inequality can not continue indefinitely in a democratic society.
(52) Sitting in the high-ceilinged library of his comfortable flat, he looks the part: bespectacled, a man of thoughtful pose.
(53) She seemed very thoughtful, and as I was leaving, she placed a ring on my finger.
(54) His words to the tree seemed to be respectful and thoughtful, and he addressed whatever he saw as Sister.
(55) This was a very informative, intelligent and thoughtful presentation, with slides which were mostly well chosen.
(56) Of course this kind of thoughtful extension is alien to most Highland hotel owners.
(57) He was fairly certain she had no idea of how gentle he had been, how thoughtful.
(58) Let us be kind and thoughtful and not to be unkind and hurt other people.
(59) Although, with hindsight, the more thoughtful members of Stark realized that the cause of his death was chillingly ironic.
(60) This helps them to produce work substantially more creative and thoughtful than what they have been able to do before.
More similar words: a thought, forethought, at the thought of, deep in thought, frightful, delightful, though, although, as though, even though, ought, thorough, throughout, sought, bought, thoroughly, brought, drought, ought to, through to, overwrought, nightfall, fretful, tactful, boastful, doubtful, wistfully, tactfully, deceitful, resentful.