adjective
1.
concentrating one's attention on something
listeners attentive to the speaker's appeal
Synonyms: advertent, arrect, heedful, intentive, observant, regardful
Related Word: alert, aware, mindful; agog, eager, interested, keen; concentrating, earnest, intent; open-eared, open-eyed
Idioms: all ears ( or eyes), on the ball, paying attention
Contrasted words: absorbed, abstracted, bemused, preoccupied; absentminded, daydreaming, faraway, oblivious, wandering, woolgathering
Antonyms: absent; inattentive
2.
Synonyms: thoughtful 3, considerate
Contrasted words: aloof, indifferent
Antonyms: inattentive; neglectful