What term describes a strong inclination or definite liking for something?

The term that best describes a strong inclination or definite liking for something is "penchant." This word signifies a lasting and proactive tendency towards something, indicating not just a fleeting interest but a deeper appreciation or attraction. While "affinity," "predilection," and "preference" also relate to liking or inclination, "penchant" specifically conveys a strong and often habitual appreciation for something, which aligns closely with the concept of a strong inclination.

"Affinity" typically suggests a natural attraction or connection but may lack the intensity implied by "penchant." "Predilection" does imply a strong liking but is often used more formally and may not carry the same connotation of habitual action. "Preference" indicates a choice or favoring one thing over another without necessarily implying the depth of feeling that "penchant" encapsulates. Thus, "penchant" is the most accurate choice for describing a strong and definite liking for something.