absolutely required and not to be used up or sacrificed
absolutely necessary; vitally necessary; "essential tools and materials"; "funds essential to the completion of the project"; "an indispensable worker"
being or relating to or containing the essence of a plant etc; "essential oil"
delivered at the moment of parting as if in flight or retreat; "paused to deliver a parting shot at the door"; "a Parthian volley of expletives from Uncle Billy"- Bret Harte
a playing card in the major suit that has one or more red hearts on it; "he led the queen of hearts"; "hearts were trumps"
an inclination or tendency of a certain kind; "he had a change of heart"
the courage to carry on; "he kept fighting on pure spunk"; "you haven't got the heart for baseball"
the hollow muscular organ located behind the sternum and between the lungs; its rhythmic contractions move the blood through the body; "he stood still, his heart thumping wildly"
the locus of feelings and intuitions; "in your heart you know it is true"; "her story would melt your bosom"
a firm rather dry variety meat (usually beef or veal); "a five-pound beef heart will serve six"
a plane figure with rounded sides curving inward at the top and intersecting at the bottom; conventionally used on playing cards and valentines; "he drew a heart and called it a valentine"
knowing and perceiving; having awareness of surroundings and sensations and thoughts; "remained conscious during the operation"; "conscious of his faults"; "became conscious that he was being followed"
intentionally conceived; "a conscious effort to speak more slowly"; "a conscious policy"
a fundamental emotional and activating principle determining one's character
any incorporeal supernatural being that can become visible (or audible) to human beings
the vital principle or animating force within living things
the general atmosphere of a place or situation and the effect that it has on people; "the feel of the city excited him"; "a clergyman improved the tone of the meeting"; "it had the smell of treason"
(law) an explanation of the fundamental reasons (especially an explanation of the working of some device in terms of laws of nature); "the rationale for capital punishment"; "the principles of internal-combustion engines"