Antonyms of adj collapsible

1 sense of collapsible

Sense 1
collapsible (vs. noncollapsible), collapsable -- (capable of collapsing or being collapsed; "a collapsible boat")

noncollapsible (vs. collapsible), noncollapsable -- (not capable of collapsing)
        => nontelescopic, nontelescoping -- (not telescopic)

Similarity of adj collapsible

1 sense of collapsible

Sense 1
collapsible (vs. noncollapsible), collapsable -- (capable of collapsing or being collapsed; "a collapsible boat")
       => foldable, foldaway, folding (prenominal) -- (capable of being folded up and stored; "a foldaway bed")
       => telescopic -- (having parts that slide one within another; "a telescopic antenna"; "a telescopic drinking cup")
       => tip-up -- (constructed so as to tip up or out of the way; "the little tip-up seat of the taxi")