thumb

definition: a convex molding having a cross section in the form of a quarter of a circle or of an ellipse
example:
speech part: noun
synonyms: ovolo
definition: the part of a glove that provides a covering for the thumb
example:
speech part: noun
synonyms:
definition: the thick short innermost digit of the forelimb
example:
speech part: noun
synonyms: pollex
definition: feel or handle with the fingers
example:
speech part: verb
synonyms: finger
definition: travel by getting free rides from motorists
example:
speech part: verb
synonyms: hitch
definition: look through a book or other written material
example: I thumbed through the report.
speech part: verb
synonyms: riffle

thumb is explained and pronounced

How thumb is being used?