adjective
1.
characterized by or exhibiting the power to think
the doctor had a shrewd rather than a thoughtful face
Synonyms: cogitative, contemplative, meditative, pensive, ||pensy, pondering, reflecting, reflective, ruminative, speculative, thinking
Related Word: analytical, calculating, logical, rational; earnest, grave, melancholy, serious, sober, studious; brainy, intellectual; deep, inseeing, introspective
Contrasted words: irrational; dull, slow, stupid, unthinking; empty-headed, shallow, vacuous
Antonyms: thoughtless
2.
Synonyms: mindful 2, heedful, observant, observative, observing, regardful
3.
mindful of others
the thank-you note was a thoughtful gesture
Synonyms: attentive, considerate
Related Word: anxious, careful, concerned, heedful, mindful, solicitous; chivalrous, civil, courteous, gallant, gracious, polite, well-bred
Contrasted words: careless, heedless, inattentive, negligent, remiss, unconcerned, unmindful, unthinking; inconsiderate; discourteous, impolite
Antonyms: thoughtless, unthoughtful